Malicious PDF — malware analysis report

Static analysis result for SHA-256 158ea42b0fdbcf37…

MALICIOUS

PDF

41.4 KB Created: 2020-08-10 21:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b4956fbb11aba7712042fc7a251d122e SHA-1: 8a607af82694c7c6a4cbdc90993d30063f96c405 SHA-256: 158ea42b0fdbcf3730aa23d71d7027239d8f6cffacc44d64660fbfa0db247475
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of links to external PDFs, masquerading as a "story elements chart pdf". The primary redirector URL, https://ttraff.cc/pify?keyword=story+elements+chart+pdf, is used to funnel victims to a link farm of other PDFs, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of malicious redirector and link farm activity.

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=story+elements+chart+pdf In PDF document text
    • http://files.falconssoftball.com/uploads/1/3/1/4/131438268/wenolino_repuxobet.pdfIn PDF document text
    • http://files.kerrymaymakes.com/uploads/1/3/1/4/131411474/75f5d5152b272b.pdfIn PDF document text
    • http://files.hallpt.com/uploads/1/3/2/6/132695569/manufasuzegumabana.pdfIn PDF document text
    • http://dabaze.cathybaylorpiano.com/uploads/1/3/0/7/130776031/c04393ef16336.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/1/0432/8495/5300/files/7072133649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3538/4225/files/42699819287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/varied_commodities_recipe_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/volivuliwuwuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3836/6113/files/kewujafujone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/nonumovonuvosepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/puzalodiweraginapavanan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/wuzujifafasubadekef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/vonukabikipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/9965208854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/80128530129.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 4

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_off000063f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 5600 bytes
SHA-256: c2a145ae448dcdc857363181ead43505fdc4d15236844b0193aad596b7487927
font_01_sfnt_off000076cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CF 9948 bytes
SHA-256: 1d0909421784d1d3f6bbe0179cbc2ab8185f62901160f4f1d6af4aec330dea74

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