Malicious PDF — malware analysis report

Static analysis result for SHA-256 19315a31809d944c…

MALICIOUS

PDF

39.5 KB Created: 2020-08-08 13:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dbf5bd81669f6ac644e8b4ac48f074a3 SHA-1: 11e802dcc8037e46871d7572b5dac11e26873757 SHA-256: 19315a31809d944c6bd112328c23eefddb03c01910b393dfd61f52f3eba81a03
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious sites. The document body, though obfuscated, contains a URL that points to a redirector, which in turn links to other PDFs. This pattern is consistent with SEO poisoning or phishing lures designed to lead users to malicious content or phishing pages.

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.cc/pify?keyword=cash+flow+statement+problems+with+adjustments+pdf In PDF document text
    • http://files.beautifuldefect.com/uploads/1/3/1/1/131163872/ruvuradopadol-pedamaxud.pdfIn PDF document text
    • http://files.duannkier.com/uploads/1/3/0/7/130775971/7854723.pdfIn PDF document text
    • http://files.innovaxin.com/uploads/1/3/1/4/131453247/velibawuximeruga.pdfIn PDF document text
    • http://files.bullengarookadultriders.com/uploads/1/3/2/6/132681596/fomapofegaro-wopigadazodup-zevevamer-tirexilagenizo.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/1/0432/6601/5400/files/76980135056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/95945221804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/75962043116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1760/8090/files/comparative_and_superlative_adverbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/jekijasodunupiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3156/8290/files/39157223718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bewasovenajuwawofitef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6231/9517/files/al_quran_hafizi_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0952/2339/files/organic_farming_wrt_cosmic_energy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1440/6823/files/simple_present_exercises_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/nibazelitedarifupusa.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 8

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_off00005d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D72 5492 bytes
SHA-256: 41b54ed2f253b89e5466b85aa4be240a302e3f793d0b5d80ab177d3ca94962c9
font_01_sfnt_off00006ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFB 9648 bytes
SHA-256: 7dd69f6f26ed0c9db6d6f4740c82278f61d890ed0319a4c67330a633cdeaa8a7

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