Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db702ab312c7241…

MALICIOUS

PDF

52.6 KB Created: 2020-08-21 16:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6b95c95e813094d77df0cf61a9f2c3a SHA-1: d7ee9c8283587b42de047e1df3bc984deb12829f SHA-256: 1db702ab312c724155aa06b4171174d4a3e143d2736d5f5bb55360d95c505840
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=commando+2+movie++720p+khatrimaza`. This URL is presented within the document body, disguised as a movie download link. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=commando+2+movie++720p+khatrimaza
    • http://xometi.sochicompany.com/uploads/1/3/0/8/130874019/xurebibep_pozuzumox_tawetuvugo.pdf
    • http://megesut.aishi.co.uk/uploads/1/3/1/4/131410007/6638053.pdf
    • http://zovozo.annblackburnpoetry.com/uploads/1/3/2/8/132814930/somevokedowedub-gozige.pdf
    • http://files.charaliliana.com/uploads/1/3/0/8/130874329/459430.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55628578329.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/56132177417.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2630/files/70720054426.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3301/files/61499538173.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/ordering_fractions_from_least_to_greatest_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0463/3523/0114/files/nunaroni.pdf
    • https://cdn.shopify.com/s/files/1/0434/0544/3237/files/catalogo_vimar_plana_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/android_sdk_level_26.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/misezadigakugopodujinida.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1354/files/95639554705.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/prehepatic_jaundice.pdf
    • https://cdn.shopify.com/s/files/1/0437/8247/1837/files/3664763233.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/53740575868.pdf
    • https://cdn.shopify.com/s/files/1/0437/5478/2869/files/2693231819.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_off00006bc2.bin
aee4925c6130c4f50c0187a8bbe453b242a5a261304b4429c02b27345272cca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC2 5420 bytes
font_01_sfnt_off00007e17.bin
d24c03c9af7d9e94fa05ce61344a9d5347e4f5475a2c6f970189c78a9e9b7b00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E17 15472 bytes
font_02_sfnt_off0000adfc.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADFC 16164 bytes

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