Malicious PDF — malware analysis report

Static analysis result for SHA-256 04438371df82c88f…

MALICIOUS

PDF

36.3 KB Created: 2020-09-01 10:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 478f74141dd835647776e6cd26857f31 SHA-1: 15666c283756c2ad8e45bd3bc5ff9b18c10ff68e SHA-256: 04438371df82c88f74b37b17bb92e5eb81d185e15b6a98dcf9bd3e75bae4ab2f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=academy+of+management+review+submission+guidelines', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to academic submission guidelines, suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to obscure the malicious URL.

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.me/wix?keyword=academy+of+management+review+submission+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ea5d7b_26df5e1ce26e45c9836b5eabd222ad80.pdf
    • https://static.usrfiles.com/ugd/b8c837_00a9562b2044405db30aef232bb75b87.pdf
    • https://static.usrfiles.com/ugd/3aee12_1c3382f707444505a465909daa420f58.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_a3d51da9c4ea484d8a35ef0c1e9c6585.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/94290837755.pdf
    • https://cdn.shopify.com/s/files/1/0437/1234/8314/files/idc_online_reports.pdf
    • https://cdn.shopify.com/s/files/1/0429/3001/2316/files/12237266460.pdf
    • https://static.usrfiles.com/ugd/37428b_a45f5b46de0043bf8ce5035db552ca82.pdf
    • https://static.usrfiles.com/ugd/b8c837_04244193227144738393786ac1a82aa0.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/makalah_tentang_filariasis.pdf
    • https://cdn.shopify.com/s/files/1/0441/1306/8184/files/sajonofodapigusagowiwimek.pdf
    • https://cdn.shopify.com/s/files/1/0436/5041/6793/files/nuwaxukofodufeka.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/xowumaseviwojopen.pdf
    • https://cdn.shopify.com/s/files/1/0439/0325/4683/files/android_10_oneplus_5_xda.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d83.bin
b902c8b1db2c65f5b1bf49fd0feded0ef22dc5d484dae03ddfb6723f563b788e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D83 5724 bytes
font_01_sfnt_off0000610f.bin
9197b24a4af004c2fe14bfc70fe94bddd6376906a7719222e4336843efc3866b
pdf-font-stream PDF embedded font (sfnt) at offset 0x610F 10332 bytes