Malicious PDF — malware analysis report

Static analysis result for SHA-256 01db30a39663c85a…

MALICIOUS

PDF

41.3 KB Created: 2020-08-01 23:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50f1b6e585fe1a9071f26fe6763ed144 SHA-1: 6072a2640540fe67aaa774f8845a6d91eec941bf SHA-256: 01db30a39663c85af6ae282a5fbb8d97453ae1ab68d23260ea51739e16cd3581
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains a large number of external links, many of which point to a link farm. One of the embedded URLs, https://ttraff.com/pify?keyword=the+whole+earth+catalog+pdf, is identified as a malicious redirector. This suggests the document is designed to lure users to malicious websites, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

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=the+whole+earth+catalog+pdf
    • http://files.myvintagesuite.com/uploads/1/3/0/8/130815437/sabojewi-levozazugazuxod.pdf
    • http://files.thebrowneyedsusan.com/uploads/1/3/0/7/130739626/8129586.pdf
    • http://files.alamosavalleyhumaneleague.org/uploads/1/3/1/3/131383791/10af04.pdf
    • http://files.benevets4thebrave.org/uploads/1/3/0/7/130775596/tuzubozezufokalin.pdf
    • http://files.garyschmitt.com/uploads/1/3/1/4/131453132/mipodinajobute-vufudara.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3911/9765/files/96542255013.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxepetumikikexozifaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/39555411123.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/maxoritiduretapimenak.pdf
    • https://cdn.shopify.com/s/files/1/0432/3626/2052/files/luba_hegre_p_hub.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/zuxoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/2031/2991/files/44237172259.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7490/3452/files/63913429018.pdf
    • https://cdn.shopify.com/s/files/1/0430/3853/9927/files/tizuzoba.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/58878739178.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_off00006310.bin
ddf182de921d2e237b2b40483fe020c0d96cf2fe8451eb0d6d930fe4dc60fdc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 5280 bytes
font_01_sfnt_off00007515.bin
773a1298f347d5ea6165e251a9a6a1f861ae34c3d172b4fd7c67411dd4cf7c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7515 10344 bytes

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