Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6104982d3511b36…

MALICIOUS

PDF

43.1 KB Created: 2020-08-24 07:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8677d38dd41653e08db8abf57a684d97 SHA-1: d77463e77ae0411ff7035e4fc7a5f93301620ade SHA-256: a6104982d3511b3665f26618fefd91c72e7fcfaf678f379a01a88594847987f6
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and numerous other links to external PDFs hosted on various domains. This suggests a link farm or SEO poisoning attack designed to lure users to malicious sites.

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=negative+prefixes+in+english+pdf
    • http://files.fairyringschool.org/uploads/1/3/1/4/131437889/5486c9027237cdc.pdf
    • http://binomerid.ancestral-pathways.com/uploads/1/3/2/8/132814930/8057185.pdf
    • http://files.davidperlock.com/uploads/1/3/1/1/131164473/7338928.pdf
    • http://files.balmdotcalm.net/uploads/1/3/1/0/131069968/5683247.pdf
    • http://kojodifo.bvswgirlsbball.com/uploads/1/3/2/7/132741615/pasibabekagawibijew.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/41599680703.pdf
    • https://cdn.shopify.com/s/files/1/0434/8854/2872/files/segiwukevenopu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/62516159770.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/zezasewavufumebuju.pdf
    • https://cdn.shopify.com/s/files/1/0439/4326/4411/files/cheesecake_factory_job_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/zisaruwijur.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/50896657953.pdf
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/woponidigodemem.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3413/files/96688739481.pdf
    • https://cdn.shopify.com/s/files/1/0432/8295/6443/files/sevisavepig.pdf
    • https://cdn.shopify.com/s/files/1/0435/3890/7288/files/83163262600.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_off00005e48.bin
c48d0d22bb84dfc261c3663998d20e152319ee875eb3451e661f51d4ebd169a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E48 5080 bytes
font_01_sfnt_off00006f8d.bin
12b32efe6c986e636639dcfdd0327bae177ddcac102296788d0f63060c77c799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8D 10008 bytes
font_02_sfnt_off00009195.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9195 4324 bytes

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