Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3788c795065d790…

MALICIOUS

PDF

43.3 KB Created: 2020-08-25 07:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07a7c8966c2bf507d3afba17db2d9d8c SHA-1: 41f7ed439bbbb087b38ec5c8f3ea949809d19f18 SHA-256: e3788c795065d79084a69f4cdb49ce382674201b4ca8948dacbe09d8dcaed6c0
152 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to 'ttraff.com', identified as a malicious redirector. This redirector is likely used to deliver a second-stage payload or phish for credentials. The document body, though partially corrupted, contains text related to 'Adobe audition 3 free full version', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious.

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=adobe+audition+3+free+full+version
    • http://files.jeremymichaelcohn.com/uploads/1/3/2/7/132710732/bajuxezune-vudanizigakin-jifedikipexinet.pdf
    • http://files.createmoremusic.com/uploads/1/3/1/1/131163788/valigawumas-mivoju-jobasifanax.pdf
    • http://files.wildfirefitnessllc.com/uploads/1/3/1/3/131384113/7ddb7.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3277/files/62298014874.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/7533422161.pdf
    • https://cdn.shopify.com/s/files/1/0433/4524/8421/files/56694150535.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/jeniwonused.pdf
    • https://cdn.shopify.com/s/files/1/0464/6040/3880/files/18611560472.pdf
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/62208145990.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/kadidoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/72118949992.pdf
    • https://cdn.shopify.com/s/files/1/0435/6443/3566/files/best_android_emulator_mac_2019.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/kovefiloxinoranuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/5457/0399/files/arteries_and_veins_of_upper_limb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/zelirolimokojogoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2635/7152/files/git_deployment_script.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_off00006616.bin
10d9007119a7d24758aac1765ba1a44915e3ff2056493ead0c110eb56f81346a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6616 5252 bytes
font_01_sfnt_off0000780c.bin
8eafb55595a5584f68dc47f22862385c63c46e2b4a692babc952d9f7f1f36e24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780C 12668 bytes

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