Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7cf0c48d74a32e…

MALICIOUS

PDF

44.1 KB Created: 2020-08-04 05:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0e850497b226f60515fc1f2887f0c7d SHA-1: 1c7134cb06f2ccd50f9c42252f3c7b537c31d0dc SHA-256: fb7cf0c48d74a32ed2379fd6620103a726095f87128657535406f6f7e56b52b0
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure related to 'Mercado Livre energia pdf'. The primary malicious URL identified is https://ttraff.cc/pify?keyword=mercado+livre+energia+pdf, which is likely used to redirect users to a malicious site.

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=mercado+livre+energia+pdf
    • http://files.ritrapshootingassoc.org/uploads/1/3/1/4/131436981/175e516e.pdf
    • http://pupujidir.katherinemcmahonart.com/uploads/1/3/1/0/131069899/1370564526.pdf
    • http://files.stjohnlutheransherburn.org/uploads/1/3/1/3/131398452/bopum-riwikofigasepu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6365/4040/files/esl_ordinal_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/xodejikavuxige.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2728/files/13718854146.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/91745974328.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/fixetekufetoxofowig.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/sawavazoxubozunenarigel.pdf
    • https://cdn.shopify.com/s/files/1/0436/4559/9904/files/ginaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/69868388893.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/72334709456.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/70618663426.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/tugugizubig.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/56721874570.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/19672510643.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6791/files/mudobobuxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/nifekim.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_off00006902.bin
810dcfa5efcd3a4c1d1963d8e8a80e636452dd9c01a06d2c6ec4b2cabf90e299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6902 5208 bytes
font_01_sfnt_off00007ae2.bin
8d87922d6cc98f57fac2b313b2d772f478582c25b89adee8d7685d6d1a0189ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE2 13264 bytes

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