Malicious PDF — malware analysis report

Static analysis result for SHA-256 8136a6f4cb95669d…

MALICIOUS

PDF

49.2 KB Created: 2020-08-02 15:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0404a133be0c85ec2548738fa652870c SHA-1: 8a076a29b2049eef61c88d87453ba93c62cc7d7f SHA-256: 8136a6f4cb95669df70c5932a07a2c11ae5f6135239bf0e99bf7c7b2f48ac172
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), indicating a high likelihood of malicious intent. The document body, though partially corrupted, contains the URL https://ttraff.cc/pify?keyword=kewaunee+fishing+report, reinforcing the malicious redirection finding.

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.cc/pify?keyword=kewaunee+fishing+report
    • http://files.kimstravelers.com/uploads/1/3/1/4/131453247/576995b00e2fc.pdf
    • http://files.theveganoutfitter.biz/uploads/1/3/1/4/131438069/mafumufupa.pdf
    • http://files.uneek-gifts.com/uploads/1/3/0/9/130968981/31aae79c633fd.pdf
    • http://files.antoinettepinder.com/uploads/1/3/2/6/132695575/7763459.pdf
    • http://files.simplyscrunchyeg.com/uploads/1/3/0/8/130813991/dapipevixegagilusij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/dotovakumij.pdf
    • https://cdn.shopify.com/s/files/1/0433/1582/2747/files/8970273366.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/70381243982.pdf
    • https://cdn.shopify.com/s/files/1/0436/3472/0928/files/bilinear_transformation_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/gitedubuzaruniwuxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/tatipaponubuxisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/51527006100.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/godafebejuxopupifas.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/pafazojipiwodotos.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/6479233466.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/wikawurevopixalokepipaje.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4477/files/wepoket.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075b3.bin
d202acd5a1e0d7cf84202d2ba423353da54365f6eba5ff2a1d0206ad294bab03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B3 5072 bytes
font_01_sfnt_off0000870e.bin
b0bf246ef0481eb063dadc2a9f4b1b4234b06bc84095c72567cd2b4eb669cf93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x870E 10296 bytes
font_02_sfnt_off0000a9e4.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E4 4324 bytes

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