Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c1e86e251e12a1…

MALICIOUS

PDF

45.5 KB Created: 2020-08-01 10:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbb7fa0d0a38f7089b8a41f58ab3af43 SHA-1: dd7bfbe064b97910a1ee2252d4157349250391eb SHA-256: 38c1e86e251e12a1c614ec0c47a8849604d1f64864a22f569e1474616ee7af73
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, https://ttraff.cc/pify?keyword=column+sorting+sapui5+table, points to a known malicious redirector. The presence of numerous links suggests an attempt to lure users to malicious destinations, likely for phishing or malware delivery. No scripts were extracted, and the document body was heavily obfuscated.

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=column+sorting+sapui5+table
    • http://files.doyogawithchelsea.com/uploads/1/3/2/6/132680813/5228498.pdf
    • http://files.eathorpepollherefords.com/uploads/1/3/0/7/130775023/774833a.pdf
    • http://files.owlcat.org/uploads/1/3/1/4/131483955/jakeli_nasosom_zofebadizubopu_lulakap.pdf
    • http://files.soundsofthesouthwestchorale.com/uploads/1/3/0/7/130775232/5911820.pdf
    • http://files.ryanmilleryoga.com/uploads/1/3/2/6/132681690/ragifozesiwisofugoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/lujozewarigegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/kigonodes.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/47097962640.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wozofedotomutigetipire.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/zumexavenako.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/37011084808.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/galetorudolepoko.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5351/files/zikumowibulivewitavavevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7548/6367/files/79891577506.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/jelidujiwefavumarop.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/11927166521.pdf
    • https://cdn.shopify.com/s/files/1/0428/8993/7055/files/weed_eater_stihl.pdf
    • https://cdn.shopify.com/s/files/1/0430/9696/5269/files/didis.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_off00005e86.bin
127d67cfd27783c87a6a82c8a21313884a99f9116910d4d3bde8a4e611878cb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E86 5308 bytes
font_01_sfnt_off00007074.bin
c149f9b657f8f8bdf5924108f0cb7a9d0a1ab8e3e7e915ba4fa34e20c04965c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7074 10280 bytes
font_02_sfnt_off000093d7.bin
764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D7 16144 bytes

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