Malicious PDF — malware analysis report

Static analysis result for SHA-256 8348cf8f49b53df0…

MALICIOUS

PDF

47.6 KB Created: 2020-08-05 14:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e32db6f4e89d9092f041782a302ff271 SHA-1: 2d8117d3bc9ab0fedf5f23c110c0d67e5062ce15 SHA-256: 8348cf8f49b53df0398bfa5308089afe45563c36d7d44a6f1139d8268612d2d2
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links designed to lure users with promises of useful documents, such as 'Advanced excel all formula pdf'. These links redirect through known malicious infrastructure like ttraff.cc, which is a common tactic for phishing or malware delivery. The ML classifier strongly indicates malicious intent, and the presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=advanced+excel+all+formula+pdf In PDF document text
    • http://muwum.clearperspectivespublication.org/uploads/1/3/0/8/130813095/vokogewi_piduwesu_livug.pdfIn PDF document text
    • http://zewen.lerynturlington.com/uploads/1/3/2/6/132681352/8367474.pdfIn PDF document text
    • http://files.attercliffepharmacydirect.com/uploads/1/3/0/7/130775232/defuwo.pdfIn PDF document text
    • http://xelubo.thelightingsummit.com/uploads/1/3/1/4/131454024/3369954.pdfIn PDF document text
    • http://files.multidimensionalchromatography.com/uploads/1/3/1/3/131380870/5426e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0924/4317/files/jinupiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2675/0362/files/61902169123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8157/1227/files/7101827454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/15579968963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/cub_cadet_lt1042_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/6547288041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/61087884169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/xolugikifutatomabiduxen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/50587861389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/49981213664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/jujubobo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5C 4992 bytes
SHA-256: 73d22cc17f2552629bff22d7dc0316770593f999811a8f9d220a6f51e87a1139
font_01_sfnt_off00007b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B43 11580 bytes
SHA-256: 328ca6ca6c01ef69f83e546eac12a1ec8106343a2687d9217a08271a128f0de5
font_02_sfnt_off0000a1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2