Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc266dde7795f6a…

MALICIOUS

PDF

34.9 KB Created: 2020-08-15 07:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84fc3a4432b6cb5171f23e1012ce003b SHA-1: d551ca203506eeadaf731e1971ee2a2b06456722 SHA-256: 6fc266dde7795f6ade0ea16a95d7147e873c76df2c49d95038dda3d0092f817d
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate sales listings, but the primary link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=sheet+metal+guillotine+for+sale+australia', which is flagged as a malicious redirector. The presence of numerous Shopify links suggests an attempt to disguise the malicious intent through a large number of seemingly benign external links.

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.ru/pify?keyword=sheet+metal+guillotine+for+sale+australia
    • http://files.messymommiesinthecity.com/uploads/1/3/1/3/131378780/janasewavuwanex.pdf
    • http://jutapur.researchlearningcommunities.org/uploads/1/3/0/7/130740025/1508727.pdf
    • http://xexekes.turniptheflavor.com/uploads/1/3/0/7/130776167/68ffa680963d7d.pdf
    • http://files.ops-copiers.com/uploads/1/3/1/1/131164424/f7d901a685fa2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/sotukovese.pdf
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/48755129002.pdf
    • https://cdn.shopify.com/s/files/1/0428/9242/7430/files/newoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/raluwarekavineketurazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6541/files/42848016433.pdf
    • https://cdn.shopify.com/s/files/1/0443/0397/4556/files/tesokaduvulujilakunuweb.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/stephen_karpman_drama_triangle.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/54773257483.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/certified_scrum_master_resume.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/weduxa.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_off00004ae3.bin
1654dd28d73a2ecac9c465d107667d69410dda1fc609ff6668a48e6a2c28b657
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE3 5284 bytes
font_01_sfnt_off00005cb3.bin
79e30c3ba724105d426518fbe4637bdad0f4c78b8aa858a0e55e6f7ba1574610
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB3 10040 bytes