Malicious PDF — malware analysis report

Static analysis result for SHA-256 19048c9c04ce92ab…

MALICIOUS

PDF

44.2 KB Created: 2020-08-19 01:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fc8168b0d236a486b01d7093cd4fea4 SHA-1: b0e354eebd97c2b3084b96dd51488c4214309026 SHA-256: 19048c9c04ce92abc16d794c020c4a52c13617fdd08a1ee46836d954e12e5e25
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and references a 'calling card template', suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection scheme designed to obscure the ultimate malicious destination.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=calling+card+template+ms+word
    • http://bogun.rochecenter.org/uploads/1/3/1/3/131398455/xibipabuxeto_pudepidevuwa_siropozodevir.pdf
    • http://tasovodut.cckent.org/uploads/1/3/0/7/130775823/bc57d5bd123812.pdf
    • http://files.babbagelovelace.com/uploads/1/3/0/8/130813314/5240177.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/1122/5246/files/36850246601.pdf
    • https://cdn.shopify.com/s/files/1/0445/6975/5812/files/anglers_choice_guide_service_presque_isle_wi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6720/9893/files/69697958277.pdf
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/wanipudulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0643/files/ronobomebanifiwewob.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/xukatamoxep.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/7474114193.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/65074898317.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/quadratische_gleichungen_bungen.pdf
    • https://cdn.shopify.com/s/files/1/0439/2442/2811/files/bourne_identity_script.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/72663033043.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ebd.bin
d43c04c094dcf95c2bf74919bd27d0aea4231cdbfc24220bf5feacf19da2c5fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBD 5296 bytes
font_01_sfnt_off000070b3.bin
ce3671f93b01313f91bc39ee59667eb07df7a7001feed109e76d82e86ef5aa4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B3 11412 bytes
font_02_sfnt_off0000960e.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x960E 4324 bytes

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