Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdc8eb21a9f6ff8…

MALICIOUS

PDF

125.2 KB Created: 2020-08-07 15:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38dce6701075f681101f2119d921ee48 SHA-1: 426a1736eccc875ca39a7c19acc95109eeb898ad SHA-256: 0fdc8eb21a9f6ff873e2a0ea74b9a748070394898a9d2d426fd3de7cc1994435
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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=calidad+total+y+productividad+mc+graw+hill+pdf
    • http://xodabo.thebiophiles.com/uploads/1/3/1/4/131437657/af24d61fbefb87.pdf
    • http://files.lyftdriverreferralcode.com/uploads/1/3/2/6/132681855/6152495.pdf
    • http://files.stfepiscopal.org/uploads/1/3/1/4/131453735/2e6d6cb903c5ee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/95302529640.pdf
    • https://cdn.shopify.com/s/files/1/0433/7952/3751/files/zofoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/mitadew.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1014/files/puxoposajavosozinuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxoku.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/12884192767.pdf
    • https://cdn.shopify.com/s/files/1/0436/3229/6089/files/accounting_concepts_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/36864160784.pdf
    • https://cdn.shopify.com/s/files/1/0438/3683/3954/files/ableton_9_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4996/files/josobejutiwokuwuwobez.pdf
    • https://cdn.shopify.com/s/files/1/0430/9522/8565/files/8633709345.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/49331304965.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/basic_assumptions_of_economics.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001948b.bin
64ad14c04196a3e93ddc7c39585ede6d45760c5a59d1196effb66a6618764e13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1948B 5552 bytes
font_01_sfnt_off0001a75d.bin
190e39bd201b4cbc173b597eed66ada77a5c73c90f875704a58fdae940aac1e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A75D 13748 bytes
font_02_sfnt_off0001d280.bin
5798d6d83823f5ea0dc5a930f869e42e3744f26548bc7c0b145d5ca34fb76a92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D280 16064 bytes

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