Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65c3e2e0d276f19…

MALICIOUS

PDF

59.8 KB Created: 2020-08-12 06:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfa3fc3970e01e34bb3b0d00ce1027fc SHA-1: ae1c485591a8b0dd409a240714c3919cbd816ce3 SHA-256: c65c3e2e0d276f198378c383f115eed86a975004950fa1e8bb427cc9dab6b571
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as sheet music. This redirector likely leads to a malicious payload or phishing page. The document also contains a large number of links to other PDFs hosted on Shopify, forming a link farm, which is a common tactic for SEO poisoning to improve search engine rankings for malicious content.

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=la+vie+en+rose+piano+sheet+music+easy+pdf
    • http://files.unitedmattresswarehouse.com/uploads/1/3/1/0/131070588/4895816.pdf
    • http://files.wtho.org.nz/uploads/1/3/1/3/131384127/vezolazukosiginovuzo.pdf
    • http://files.todayhousing.com/uploads/1/3/0/9/130969243/vanamogukalazak.pdf
    • http://mozerob.amausbc.org/uploads/1/3/1/4/131411688/f20f75fa1cb8.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/25834438335.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/dedosegivuvutoxenumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jeravutudab.pdf
    • https://cdn.shopify.com/s/files/1/0447/0043/4586/files/numerologia_cabalistica_significado_dos_numeros.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/pifedorux.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/mijalafojabibedetajumoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/zilodovufikemuwexalapeva.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/alesis_qs8_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/netobinezowevonaviges.pdf
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/workplace_wellbeing_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/49595410864.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/bosons_and_fermions_in_quantum_mechanics.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/7674266415.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009681.bin
1c45ae965081101187260ee0301d40b4e3d12d29f5343a822c4eee2c9ac0513e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9681 4540 bytes
font_01_sfnt_off0000a63c.bin
3c4008d2af39d205ba1558d0c565cffce4331466fb1dfd4ea76eed37d285db22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA63C 5464 bytes
font_02_sfnt_off0000b8b9.bin
213a54eff8f834d9f21cc8ea2429b6f1f49622e40426434b2ba563dbaa6aa394		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B9 11760 bytes

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