Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf41c24d935c5fb6…

MALICIOUS

PDF

45.0 KB Created: 2020-08-02 04:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef6edddb45b45136ae47414afc2582ce SHA-1: c28b709bbaf427a537fd4686ccedc58e4b8c9311 SHA-256: bf41c24d935c5fb619d340af2f2f48ace4d1890103acbf32908978442d694c88
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, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One prominent link redirects to a malicious domain, likely intended to deliver a payload or phish the user. The document body, though heavily obfuscated, contains text related to a vehicle owner's manual and the malicious URL, reinforcing the lure.

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=2016+subaru+outback+owner%2527+s+manual+pdf
    • http://files.magnoliawoodpool.com/uploads/1/3/2/6/132695492/xomepu-fazurebebif.pdf
    • http://files.getbodyfood.com/uploads/1/3/0/7/130740049/najebijele_velufinusepewal.pdf
    • http://files.runforthefallennh.com/uploads/1/3/1/6/131607010/sevuvogakakusu.pdf
    • http://files.gwionraven.com/uploads/1/3/1/0/131070535/bekufud.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/rekawipegodifax.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/wavebevegasumotemiso.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/pupixed.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/19844868624.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/bukisubodedim.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/rifurajimogawozopejig.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/11568769630.pdf
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/kavus.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/fairfax_county_public_library_overdrive.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/40624461294.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/gadifo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/batopijumupafudido.pdf
    • https://cdn.shopify.com/s/files/1/0428/1725/7628/files/23756871107.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_off00006283.bin
bfbbaedf4b43ff69925375adaa9a40b05f666ec82776122a646769665386049f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 5852 bytes
font_01_sfnt_off00007662.bin
eaeaf1ce9bb499b5eed6a51e1d77bfe7d4bda4b0de7f7febbefae7a857d02dc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7662 10048 bytes
font_02_sfnt_off000098b1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98B1 4324 bytes

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