Malicious PDF — malware analysis report

Static analysis result for SHA-256 819b1fe2d01149d7…

MALICIOUS

PDF

35.0 KB Created: 2020-08-04 17:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c510d89b55ab74bf26f928116e8f539 SHA-1: 4cb0f21c858d2d62984d41a236f7cee56000774b SHA-256: 819b1fe2d01149d79a016f3458e0745431cc0579fca129cce476f40114dc6ee7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to redirector infrastructure. The primary redirector URL, 'https://ttraff.ru/wb?keyword=gta%205%20lspdfr%20mod%20crashes', suggests a lure related to a game mod, likely to entice users into clicking malicious links. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports 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/wb?keyword=gta%205%20lspdfr%20mod%20crashes In PDF document text
    • http://jujige.edithshope.org/uploads/1/3/0/9/130969204/tejajurexabolor-votamegibipota.pdfIn PDF document text
    • http://files.zforcegt.org/uploads/1/3/1/4/131406391/e6851.pdfIn PDF document text
    • http://files.asa989.org/uploads/1/3/1/4/131437724/nerokutemuwat_begozozawep_filiwevax.pdfIn PDF document text
    • http://nizisuda.runwaylink.com/uploads/1/3/0/7/130776265/letuvujived_nufinovaxezi_toxagezexibuj_gusojaju.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/1/0437/1818/1013/files/melij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/neviwevixuwigaximi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/57111951151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/7627148318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/fowulawalaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/how_to_install_galliumos_on_chromebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/56318286857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4438/0578/files/44054557670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9822/5320/files/42422902175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/93073154808.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 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000417b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x417B 5548 bytes
SHA-256: 3c98cf4a6afb9ab04c0335a17b18568a1b904a65b3c2a0897a003d5a63a70a6e
font_01_sfnt_off00005433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5433 2344 bytes
SHA-256: 12610f3ec96f5b33dcc7a0a84b56771198b30512ce1255fa9f9b0a69c7042c71
font_02_sfnt_off00005e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E99 9528 bytes
SHA-256: 36a7a11766f7346a7955064ae8224dca75477cd390eb4834adc52ae06d455f31

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