Malicious PDF — malware analysis report

Static analysis result for SHA-256 a150cb771b079369…

MALICIOUS

PDF

38.5 KB Created: 2020-08-18 14:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bf488020b3c6651894930a7e4b0abd46 SHA-1: 6781ca5796b2664b4fc487825741bd1024b535e6 SHA-256: a150cb771b0793691570e5cd7f642afe7bdf380c66dee54205724f9c4a484eb7
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate a PDF link farm designed to host numerous external links. The document body, though partially corrupted, contains the URL that triggered the malicious redirector heuristic. This suggests the document's primary purpose is to lure users into clicking malicious links, likely leading to phishing pages or malware downloads.

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=greetings+and+polite+expressions+worksheets In PDF document text
    • http://files.rebeccahaubner.com.au/uploads/1/3/1/8/131871614/9068884.pdfIn PDF document text
    • http://pagevo.lovinghandsbirthandmassage.com/uploads/1/3/1/6/131606731/4427971.pdfIn PDF document text
    • http://baxaj.younglifeeastmanatee.org/uploads/1/3/1/6/131636881/wuvom.pdfIn PDF document text
    • http://vinafur.annotatingpmbok.com/uploads/1/3/1/4/131437421/tevisanu_dadomirimapewo_jirefug_tuzat.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/1/0435/3739/9960/files/93592385741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/arjun_pandit_full_movie_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/63166182698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/lidenur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/mopixuturugonezidukesoruf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/74755616444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0056/9751/files/47834789510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/convert_byte_stream_to_c.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 1

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_off0000576c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x576C 5476 bytes
SHA-256: b027d129eb57e4bae782e93cc11127936268f802d276c468c8f2e5a2aea4f15e
font_01_sfnt_off00006a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A22 10376 bytes
SHA-256: 11eadbeb16f8660d7dda2b637a8ad3af43f59c0bae70f58bf4a4d40b10dcf983

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