Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc514b023d61702…

MALICIOUS

PDF

49.7 KB Created: 2020-08-07 14:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 673db113d5a1459e0b86b56ff161bb3e SHA-1: eba50361973283c4ea3dd341509558b162a9044f SHA-256: 1bc514b023d61702cc1017ecd686c471e1ac716b48dd81ccef59888c21d71db6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to improve search engine rankings for malicious content. One critical heuristic identified a PDF redirector link to 'ttraff.cc', indicating an attempt to funnel users to malicious infrastructure. The document body, though partially corrupted, contains text related to 'automobile engineering textbook pdf file', suggesting a lure for users seeking educational materials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=automobile+engineering+textbook+pdf+file In PDF document text
    • http://files.doublefarley.com/uploads/1/3/2/6/132683121/ec3149b3ff9.pdfIn PDF document text
    • http://titama.floridakeysoceangallery.com/uploads/1/3/2/6/132681352/44d1a1ed2.pdfIn PDF document text
    • http://petuligo.olghammel.org/uploads/1/3/0/8/130874058/4360979.pdfIn PDF document text
    • http://files.roysdrivingschool.co.uk/uploads/1/3/0/8/130813827/4730837.pdfIn PDF document text
    • http://files.sacred-reiki-tarot.com/uploads/1/3/0/7/130740522/9799753.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5214/5560/files/plant_42_resident_evil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/21400116684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/25249102453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7371/5880/files/1st_year_all_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/independence_day_anchoring_script_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/dasibejad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zemivok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zilifevuzumojewod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/a_boy_called_slow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2633/3351/files/javutibekib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/20577114507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5800/files/non_alcoholic_liver_disease.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/business_marketing_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1247/9382/files/38002087135.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_off00006dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 5236 bytes
SHA-256: d58a5d46025a689d92038b13b0741c9192ae21b972558b7f44ad90d2bd1ea937
font_01_sfnt_off00007f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F96 2116 bytes
SHA-256: 33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9
font_02_sfnt_off00008960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8960 15428 bytes
SHA-256: 9521090342c8c87200d8d308b2e823b764e759b0db86036c3cbe9f957ad63cbd