Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2783a805e8f75a9…

MALICIOUS

PDF

50.8 KB Created: 2020-07-31 21:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d17312ce5325a68a231ebc07d35f93ff SHA-1: 22a3a1b5e8ee7368aa58e32c8af3ae27d8f95845 SHA-256: c2783a805e8f75a9beb9b8a1688623699bb2de8d698556c99f8cf80aa5d08018
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to `ttraff.com`, which is flagged as a malicious redirector. This URL is likely used to funnel users to a phishing page or download further malicious content. The document body, though obfuscated, also contains the same URL and references to 'wkhtmltopdf', suggesting it was programmatically generated to host these links.

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=why+are+my+steam+downloads+so+slow
    • http://files.myshinglesstory.com/uploads/1/3/1/8/131871670/wivelosebujefo.pdf
    • http://files.smarthvacsupply.com/uploads/1/3/1/3/131380001/3866e38c01.pdf
    • http://files.modernhistoryseminars.com/uploads/1/3/2/6/132680813/bobutij-wupalokalerig.pdf
    • http://files.ldceny.net/uploads/1/3/0/7/130775221/januf-fopigilu.pdf
    • http://files.nurturefamilychiropractic.com/uploads/1/3/1/1/131164157/juval.pdf
    • https://cdn.shopify.com/s/files/1/0440/6539/0757/files/63711004786.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/14143752317.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/purovekagawepulajepemur.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/lazatene.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/dalafowutifibuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mogapusezonoxifetomo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/37932430268.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9083/files/5611614894.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/74279550628.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/widufuxomidopevemi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/29501043927.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9150/files/57526738231.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/mowakarogefakefo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000742d.bin
94d144137248c76c18ee1918d8065e88b6c79bc725a21415eee32ce36be49984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x742D 5272 bytes
font_01_sfnt_off00008608.bin
804a478dca583930251bacb8e86f9c56eac4b26cec872a8d7774536d035b9a62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8608 9948 bytes
font_02_sfnt_off0000a837.bin
b0fa52173cf04b285f5a6379e59dbec661bcf0e06b6cb6d2876f3e95daaaabac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA837 16116 bytes

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