Malicious PDF — malware analysis report

Static analysis result for SHA-256 70004fd87c202fe3…

MALICIOUS

PDF

38.3 KB Created: 2020-08-25 03:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 761d7965ecdcfebbfa860385b27c7f9b SHA-1: bd29a9546d905995e6152a05f4d30181a4a89420 SHA-256: 70004fd87c202fe3dbfc6743568ea8a79530985fd4ae769f11e685cc99dd2b75
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains text and URLs that suggest a phishing or redirection attempt, likely to deliver a second-stage payload. No scripts were extracted, but the presence of numerous external links points to a link-farming or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=b%25C3%25A9n%25C3%25A9ficiaire+effectif+pdf
    • http://gonoxeda.throughthefirellc.com/uploads/1/3/1/4/131455636/sebogonufarol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/netolufafunosasewafowuwef.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/wavemo.pdf
    • https://cdn.shopify.com/s/files/1/0439/5650/2686/files/the_apocryphal_new_testament.pdf
    • https://cdn.shopify.com/s/files/1/0438/6072/1829/files/sinororobopitopi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/carica_papaya_medicinal_uses.pdf
    • https://cdn.shopify.com/s/files/1/0429/8378/4601/files/epistaxis_orl.pdf
    • https://cdn.shopify.com/s/files/1/0431/7075/8816/files/45713318148.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/nazimaka.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000554a.bin
6887dbde41cd4cd74ccf266f92a1cc240e24fcf563192ca6c61f90c817ee2abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x554A 5128 bytes
font_01_sfnt_off00006682.bin
b07ba6deecd941c2795136d8af3c339f6702dd87f86d5d9cc3536fccf753e9d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6682 11592 bytes

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