Malicious PDF — malware analysis report

Static analysis result for SHA-256 a606af07d6ea8954…

MALICIOUS

PDF

37.7 KB Created: 2020-08-07 18:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b70ce337c682581c13875e9eb6aab3b SHA-1: a67e999a81d9011e15fe8388e896db00f6cefb23 SHA-256: a606af07d6ea8954bc8fc643eb7de5a1a72fa91865df41ac5e09f82665ccd0bd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector (ttraff.com). The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the same malicious URL and references to other PDFs hosted on Shopify, suggesting a link farm or distribution network. The primary attack pattern involves luring the user to click on these links, which likely leads to phishing or malware download.

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=smoke+on+the+water+guitar+solo+pdf
    • http://files.meteorcruise.com/uploads/1/3/1/3/131384429/lelisov_wusurovewelan.pdf
    • http://files.cozykidsembroidery.com/uploads/1/3/1/4/131409170/ninebafakafekip.pdf
    • http://zanof.kyler-leroux-coaching-portfolio.com/uploads/1/3/1/4/131437689/nezifozeminol.pdf
    • http://files.alanflemingtournament.net/uploads/1/3/0/9/130969129/86d1bfe.pdf
    • http://files.builders-bargain.com/uploads/1/3/1/0/131070378/ranebijafu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/toxifinonep.pdf
    • https://cdn.shopify.com/s/files/1/0440/8783/6837/files/43512580130.pdf
    • https://cdn.shopify.com/s/files/1/0430/9493/3665/files/dasekage.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/5203046500.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/promissory_note_dragon_s_dogma.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/41266726711.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0540/files/christmas_caroling_songbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2189/files/poximovupilojivifem.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/doguvufuxitad.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/47651115730.pdf
    • https://cdn.shopify.com/s/files/1/0449/4170/5384/files/baybayin_the_syllabic_alphabet_of_the_tagalogs.pdf
    • https://cdn.shopify.com/s/files/1/0431/4474/1024/files/46923604967.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/21581776027.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/jitezimenukoto.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c24.bin
752f3725e426f3893dd0710e24abc10b00af1eeddc9e1086f6c3d527ac01e443		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C24 5716 bytes
font_01_sfnt_off00005f83.bin
9d79f8be783de3fb345302556dea71c6c34089307a6395fe34e8c9fb6d64cc08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 12736 bytes

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