Malicious PDF — malware analysis report

Static analysis result for SHA-256 60412f37271d5702…

MALICIOUS

PDF

44.0 KB Created: 2020-08-11 18:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e00604abaf70a09c43c957719b605986 SHA-1: 4beb002751adb84a1132b233197bd345c20c35d0 SHA-256: 60412f37271d570225565ef04414d4d0e72732531336166738ff4e6c5c6285b4
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=sim808+at+command+pdf'. This URL is presented within the document body, disguised as a link to a PDF. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=sim808+at+command+pdf
    • http://kobalobew.sccliteracyproject.org/uploads/1/3/0/9/130969723/banisekuvezevo_lojodoj.pdf
    • http://files.frankm-arts.studio/uploads/1/3/0/7/130775025/xonil_jivutitijubulo_gazopaj.pdf
    • http://files.pslhsband.com/uploads/1/3/1/4/131454304/nokikexizetibod.pdf
    • http://pubiv.samgevers.com/uploads/1/3/2/8/132814930/wujobavanigole.pdf
    • http://files.doylearteducation.com/uploads/1/3/0/7/130775402/folotemuben-benexupofir-dofojawimuli-kilotanol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0141/3785/files/bohemian_rhapsody_classical_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/20843050429.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibamiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/vudimigelibixuwolo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/42990985334.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5403/0231/files/regapep.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1071/files/2899215452.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50971407729.pdf
    • https://cdn.shopify.com/s/files/1/0429/3040/5535/files/73022088291.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/8840054143.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazekenikajupupapunel.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_off00005f24.bin
f1403ec5a7be0ff359e764f43ff9ab4f94e06bf6b2d80dd9cffb4173b6be2060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 5436 bytes
font_01_sfnt_off00007183.bin
b81deb83604496b38b193a4aecb9332661b98a1c8b6615668bf691700daee8f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7183 17868 bytes

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