Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e7684b735b8925…

MALICIOUS

PDF

39.1 KB Created: 2020-08-17 09:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 040c54326777b839a53031e49a946999 SHA-1: e7427a1fa692ce5d63e921747a67386a2d92d57a SHA-256: a1e7684b735b8925b7e6caccf78414fe643a1e0984f928c93c1e8a039099e12b
194 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm pattern, hosting numerous external PDF links, many of which point to Shopify. The primary malicious URL identified is https://ttraff.ru/pify?keyword=allen+bradley+plc+5+15+manual, which is likely used to redirect users to malicious content. The document body contains garbled text and embedded URLs, further supporting the malicious intent.

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.ru/pify?keyword=allen+bradley+plc+5+15+manual In PDF document text
    • http://rijapik.steplota.com/uploads/1/3/1/6/131607095/nizizabojamudizabufe.pdfIn PDF document text
    • http://sidor.athensorchestras.com/uploads/1/3/1/3/131398455/f333f5eca.pdfIn PDF document text
    • http://vibijuto.nelsonmassage.com/uploads/1/3/2/6/132681352/2094489.pdfIn PDF document text
    • http://files.sljhorchestras.org/uploads/1/3/1/0/131070508/2edf55cb70a2.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/1/0431/2812/7637/files/adda247_puzzle_and_seating_arrangement_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2782/3778/files/8876015963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/betufugekanirolezow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/what_are_core_values.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/balwant_rai_mehta_committee_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/44545582224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6251/0236/files/31953075067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3636/9318/files/new_movies_websites_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7329/6789/files/windows_10_latest_iso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/4671559402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1268/5977/files/37666902748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0644/3176/files/42444794364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/tazunizel.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
🗂 Part of campaign: aledobandboosters.org 6 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C85 5448 bytes
SHA-256: 172827f527b2b2ee3ac69fe5e0143d9b10a2bcab13c449f15aa5dbc118856212
font_01_sfnt_off00006ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF7 9552 bytes
SHA-256: 010ad253b5b5e5a2eac8e0037fae00237e819df806ed5f3a8285044f03d7bfca