Malicious PDF — malware analysis report

Static analysis result for SHA-256 1facf3a3ae843668…

MALICIOUS

PDF

44.1 KB Created: 2020-07-28 22:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4083c207c29fd296debabcd2a1f85dcc SHA-1: c796f677f00156dddd791c6bd243fe4d7016cde9 SHA-256: 1facf3a3ae843668c14d31f621828c1f62cecec37bb91e7d8f9870c2a7b7ebad
170 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body disguised as a download for 'Chess offline for windows 10'. The PDF also contains a link farm heuristic, indicating a large number of external links, with the primary one pointing to a redirector. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary IOC is the malicious redirector URL.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chess+offline++for+windows+10 In PDF document text
    • http://files.dommerestaurant.experienceperigord.com/uploads/1/3/1/1/131164198/zefijudidexi.pdfIn PDF document text
    • http://files.canyoncreeknaturals.com/uploads/1/3/1/4/131437977/4001654.pdfIn PDF document text
    • http://files.blueseavacations.net/uploads/1/3/0/8/130813837/dodipunaxamavom-xifepa-bavutekugu.pdfIn PDF document text
    • http://files.lornasredskygeckos.com/uploads/1/3/1/1/131164446/28fcfa5c300e.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/1/0428/1230/9670/files/belududeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/4107354101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7084/7131/files/lajewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0741/8263/files/61718994480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/ganewopenitomimagobewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/vowuzurefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1208/8231/files/lazarimidumunarizet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/21633820250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5299/8556/files/womipivizivimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/27105018188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1741554469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/fewig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.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 6

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_off00007174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7174 4804 bytes
SHA-256: ff3c8ca28982d78c92d20fe3afa41a12202ae1cb0f7c86efc332a8ae114e0054
font_01_sfnt_off000081c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C3 9772 bytes
SHA-256: 112d38791711813a0b16c8c1eb0dfcfe51e6d56d370bc5c90a11df7e2f9d30f5

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