Malicious PDF — malware analysis report

Static analysis result for SHA-256 59cc29c8fc3c014a…

MALICIOUS

PDF

44.2 KB Created: 2020-08-07 04:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19ed6054e4c15a7ecf75aa4dc7cf05b1 SHA-1: f38aa161dcf108ccc7da4f43af9a55b93c138dd6 SHA-256: 59cc29c8fc3c014a8510bd84081313ae09bb240236d840784d4b0fcb1c2a6579
152 Risk Score

Malware Insights

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

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 critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=gta+vice+city+cheats+pc+pdf+english, which is likely intended to lead the user to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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=gta+vice+city+cheats+pc+pdf+english
    • http://files.shopykapparel.com/uploads/1/3/0/7/130775129/4888057dac2648.pdf
    • http://files.100womenwhocareannapolis.com/uploads/1/3/1/3/131378899/71a8e572616551a.pdf
    • http://files.aspenleafyoga.org/uploads/1/3/0/8/130874118/fiwulukolumef-forofagukonupo-rivadigi-vojova.pdf
    • http://files.tangiblegreen.net/uploads/1/3/1/4/131437491/runutomol_lazobilupafas_jumitawo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9596/5352/files/gidegatoxelozowijififol.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/arithmetic_progression_formula.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/fofirotokoxabemi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2746/files/68140075887.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/bizinewejevaxor.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/43002261899.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/28028158427.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/voxabilera.pdf
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/lujaxuvimasa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8334/7606/files/possessivartikel_dativ_bungen.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/pupuluwogibolupir.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/sonula.pdf
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/debupavibage.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_off00006e76.bin
5abffc45a83ed16cc00356e43553a27f463fe7e9b029cec213f57c0a84355433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E76 5512 bytes
font_01_sfnt_off00008150.bin
70b43b5389a1896ef1e5f379595fc06b42781e9c5377cc3177f0612083fe58c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8150 10176 bytes

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