Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f0268557e97337…

MALICIOUS

PDF

47.1 KB Created: 2020-08-19 23:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7862489722649076b9a62ab2d7c77ac SHA-1: 912bcd7a26372902074229b3ef975717c71135f7 SHA-256: 12f0268557e97337678861259d79d597070335ac77712006cda1633843e7b164
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure for an advance-fee scam, specifically mentioning a DSLR camera app and linking to a malicious redirector. The document also hosts a large number of external links, many of which are benign Shopify links, suggesting a link farm SEO tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs points towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=dslr+camera+app++for+pc
    • http://files.yumaeastlotowners.com/uploads/1/3/1/4/131438240/gutotadarifa.pdf
    • http://files.watchyourhead.ca/uploads/1/3/1/3/131398036/5720387.pdf
    • http://miguke.passagesandpathways.com/uploads/1/3/1/3/131381679/fuxebugot.pdf
    • http://files.inthegarageonline.com/uploads/1/3/0/7/130738607/gomofebejepapef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/modumorovulutatize.pdf
    • https://cdn.shopify.com/s/files/1/0433/6336/9125/files/batman_return_to_arkham_asylum_game.pdf
    • https://cdn.shopify.com/s/files/1/0436/5221/9030/files/personality_psychology_larsen.pdf
    • https://cdn.shopify.com/s/files/1/0438/6937/2576/files/44638413218.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3308/files/menerarefozonu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7693/5070/files/7083945070.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/25958435687.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/shurflo_4008-_101-_e65.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/waliv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1202/2691/files/fumupudiwipagorugogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/55618113748.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/7295983271.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bfc.bin
789f190be7eb9c0c018688c4309bd5027db0ba2e089b8c3cd75e4f198a76949d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFC 5160 bytes
font_01_sfnt_off00008d6d.bin
3dfb7540a8103e16d18d88f7675f9566090b8dcdc1e0f9d208cbc0ef521d6e05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6D 10112 bytes

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