Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aec546d386b15fa…

MALICIOUS

PDF

38.9 KB Created: 2020-10-06 14:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4accfc9f5ae107f2f5648c95fad53dd0 SHA-1: f27f02f2d7a042e73c85c28de01fd971e644c61a SHA-256: 1aec546d386b15fa0a095f6cd0d0098701c081c22da2930a82b686e74b4bdb97
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm. One of the primary links, 'https://gettraff.ru/pify?keyword=lifting+the+veil+spiritual', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is part of an SEO poisoning or content spam campaign designed to drive traffic to malicious infrastructure.

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://gettraff.ru/pify?keyword=lifting+the+veil+spiritual In PDF document text
    • http://files.beautifulshots.com/uploads/1/3/2/6/132682704/xubedapatigutakuzav.pdfIn PDF document text
    • http://files.vetcliniceh.com/uploads/1/3/1/4/131437085/koboraxubuniwa_kajesa_pabunuminori_vovov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1687/8242/files/xexeturejudijanozimikanik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0601/7692/files/jesus_mi_fiel_amigo_letra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3224/7445/files/6461874586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/feloviwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1560/9761/files/ffxi_black_mage_subjob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/rusozuxulojute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/focus_on_yourself_sis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/classical_conditioning_activities_psychology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9439/6068/files/12597890688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/d_half_diminished_seventh_chord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4593/6535/files/81560119878.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B79 5164 bytes
SHA-256: 2b558a3072e20285a1946d33b3da806d5b32872ac107f1ccdcf8e8129a785e8a
font_01_sfnt_off00006d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1D 10012 bytes
SHA-256: 940ff69af14491a48b0e15ea148fb5663c0f909cd548161cdc633dba0075ed86

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