Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85e46925a95e63d…

MALICIOUS

PDF

45.7 KB Created: 2020-08-24 23:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 174a3fb53e9c790577ef30db709cd112 SHA-1: 08e6648ac11e9287332652ade36e0a663030196b SHA-256: a85e46925a95e63dafd18853c8e01f12a6fee89947c238b66c82cbceeb45b03c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links pointing to various PDF files, with a significant portion hosted on Shopify. One of the primary links directs to a known malicious redirector. This suggests a tactic to distribute malware or engage in SEO manipulation for malicious purposes. 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=akcent+my+passion+lyrics+video
    • http://pegop.brellaboxfishing.com/uploads/1/3/0/7/130775320/6484945.pdf
    • http://binalom.vinoetamicis.com/uploads/1/3/1/4/131406821/1425fc6c8d4.pdf
    • http://rujawuxib.openwindowdesigns.com/uploads/1/3/1/6/131607163/1626973.pdf
    • http://files.drstellamedicalintuitive.com/uploads/1/3/0/9/130969809/nawizu-gabuxix-laxewose.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/nunobiwogumajozejipupak.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5883/files/jawokewibu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3388/files/general_aptitude_test_sample_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2080/4511/files/clinical_biochemistry_multiple_choice_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0711/files/stun_server_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/dazavogabazaresaxavowe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8019/4975/files/74160039361.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/diggy_s_adventure_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/jinujimam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jobevemavesofidubuxiwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6594/files/gixamajebedosazajasa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/convert_to_svg_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/26346152851.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/popujokewivelugugev.pdf
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/auxinas_definicion.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/
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/popujokewivel

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b2e.bin
f62bcca0b3de3f36e96233e4d9d0e041b9356d235fbec17d2def0c5ca85291cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B2E 5220 bytes
font_01_sfnt_off00005cd1.bin
2b89602732fc5f6bb267ffd6bb5e65fce45331572ba5ec6133430173d7eb8010		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD1 9660 bytes
font_02_sfnt_off00007baa.bin
1272bb27eaa3b4bc89ecaf81a6b022f3987c07418d5b7fdc4b4141c6a3c2ccd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAA 19184 bytes
font_03_sfnt_off00009ad8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD8 4324 bytes

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