Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c7fa44b1564d0a…

MALICIOUS

PDF

44.6 KB Created: 2020-08-06 18:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4227fec22e1847ecb99cf457a8401134 SHA-1: 192e9d7aa5303cf94763ac9b3b70cce4d4626cf0 SHA-256: c9c7fa44b1564d0ab3aa5524f25d9a6bce46bb52ea357056352095b5cefd774d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm, suggesting a tactic to improve search engine ranking for malicious content. The primary malicious IOC is the redirector URL, which is likely used to obscure the final destination of the attack.

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.com/pify?keyword=lectures+on+tung+s+acupuncture+points+study+pdf In PDF document text
    • http://files.gettingtogethernow.com/uploads/1/3/1/4/131437172/suwelidawinu_kutaduvoxu_wefanimi_suxemalibujudam.pdfIn PDF document text
    • http://files.homesteadfed.com/uploads/1/3/1/1/131164321/cb568fbbf7.pdfIn PDF document text
    • http://files.gaualauf.com/uploads/1/3/0/7/130775192/gikawigadan_mosaga_kiremujijugu_gunejife.pdfIn PDF document text
    • http://files.jclandscapingandmasonry.com/uploads/1/3/0/9/130969855/masoxis-gutifavujifese-jakitojosaxo-difitomadebuv.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/1/0431/1403/7397/files/tuzerudisem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/boron_family_ncert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/stoelting_anesthesia_and_coexisting_disease.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/athlean_x_workout_routine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3997/3788/files/72622662075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/xurezugexafezos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/revopupatinapigovafunepes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/70802287916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/1515081924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/xewiramumuwifinigadiviket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/barron_s_ap_psychology_flashcards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/10375212171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/55895971263.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_off00005b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B74 6028 bytes
SHA-256: 3ad5dfd01c47b192a21946202e1dc54c58b4b38c71cab18b091cecdeae4c571c
font_01_sfnt_off0000702b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702B 5332 bytes
SHA-256: 179466020a9fa223efc954e978976fc2b905bcb5bf01dbf45c043867ed522e9b
font_02_sfnt_off0000826e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826E 10028 bytes
SHA-256: 50f6934c3d358b8cf1c809554cb9926b08aefec56bfaa5d648fab56f2ac2133d