Malicious PDF — malware analysis report

Static analysis result for SHA-256 a938ac1fbb4335fa…

MALICIOUS

PDF

44.4 KB Created: 2020-08-22 00:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fc0605b56c28220c18471232afdb4cb2 SHA-1: 86b0b11a44c4bf72190543210bc4f47fb4c7ea53 SHA-256: a938ac1fbb4335fab1c0cd4a4279b44bdec4269f0feadb762da121cd1ea449e1
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=android+emulator+on+pc+with+bluetooth'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The document body text, though heavily obfuscated, contains the same URLs, reinforcing the social engineering lure to click these links. The primary intent appears to be redirecting the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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.
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=android+emulator+on+pc+with+bluetooth In PDF document text
    • http://sawib.mvhslib.com/uploads/1/3/2/6/132683071/fenubixizegalixuk.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/1/0435/1036/6362/files/wavewozetotamafom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6333/5319/files/8300617999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/42759873623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/98454773611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/dukewiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/17910998621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6979/0618/files/keronajelesanumifeviwila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/52412756130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3323/0488/files/65844658398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/analytical_chemistry_skoog_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/giant_bomb_unprofessional_fridays.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/telusazasiwol.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F70 5356 bytes
SHA-256: d66b4fb7295c45f71797c154b5e44db6c0d84d9e8176aae37354ad2b069d9e5f
font_01_sfnt_off0000817b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817B 10196 bytes
SHA-256: 5382d7faa8ec2b2a93194dbefebbb65f43d493dc2146824150ee46c6869478cf

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