Malicious PDF — malware analysis report

Static analysis result for SHA-256 bead3c70f837cb28…

MALICIOUS

PDF

50.5 KB Created: 2020-07-30 20:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9c2a64e62ce557cffb3992be6f350c1 SHA-1: 466703bf0572f7d3bc2b9ae864441aadaaf4efb9 SHA-256: bead3c70f837cb28939137c5b5b0ba62b1722a6096d5f86605dbc85265ef4185
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, which is characteristic of a link farm designed to manipulate search engine results or obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the ultimate destination for users clicking on the document's links. The document body, though heavily obfuscated, contains text related to 'mental ability test questions', suggesting a lure to attract victims. No scripts were extracted from this sample.

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=mental+ability+test+questions+with+answers+pdf+for+class+10
    • http://files.northbaytheatrics.com/uploads/1/3/2/6/132681201/sadoxuvaro.pdf
    • http://files.mcdcpa.com/uploads/1/3/1/6/131606473/056ea29400d03.pdf
    • http://files.karaleighmillerauthor.com/uploads/1/3/1/3/131398076/952543.pdf
    • http://files.nokilladvocacycenter.org/uploads/1/3/2/6/132683014/90e5c.pdf
    • http://files.dare-tobelieve.com/uploads/1/3/1/1/131164281/budexivika_puvosigezimima_wesegi_zipoka.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/zadojevave.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/narufusowaruwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vixegenosevisime.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/dabovikenovulunuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/53253883799.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/xukabibixupe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/46023745991.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/57644645815.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/matatubajul.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/21883152921.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/3717908468.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b7c.bin
201328ead3a6a4347508c1588efabcf1e09f01edad018cac7227b1833d2f0dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7C 5784 bytes
font_01_sfnt_off00008f3a.bin
d8f4e9501c970fd1e36d32e7fe7ba373a0acabd8d4820bf7b1d1f99543652524		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3A 14632 bytes

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