Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab05ce64d59a710c…

MALICIOUS

PDF

34.2 KB Created: 2020-09-01 00:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e72374f06761f45f9b1d03253031d204 SHA-1: d988e014cbc95b376c94da8d1e7040c1eaed9a1f SHA-256: ab05ce64d59a710cc344e4e98b5581df41263f254f35dd75d714f7fb9d9c20ad
154 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains numerous embedded links, many pointing to external PDFs hosted on Shopify, suggesting a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=lagu+bidadari+tak+bersayap+cover+akustik'. The document body contains garbled text and URLs, further supporting the malicious nature of the file.

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.com/pify?keyword=lagu+bidadari+tak+bersayap+cover+akustik
    • https://cdn.shopify.com/s/files/1/0448/9153/7563/files/82808928014.pdf
    • https://cdn.shopify.com/s/files/1/0463/2379/4077/files/1059314705.pdf
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/accident_report_form_worksafe.pdf
    • https://cdn.shopify.com/s/files/1/0443/0535/0812/files/ntr_biopic_movie_audio_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/42593909087.pdf
    • https://static.usrfiles.com/ugd/1be480_b7a80eb4c9904a3bbbac1a6e4837b201.pdf
    • https://static.usrfiles.com/ugd/b85eb0_d9a2ce68f6fb441bb82ddc11a4f3134f.pdf
    • https://static.usrfiles.com/ugd/ab059d_d3b394fa644e491a99b8b110385a1922.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_30735cdeae0346099bf9ce300174cd5d.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/wizard_s_spell_compendium_volume_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/anticoagulation_guidelines_chest.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/apache_tomcat_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0463/5200/7325/files/20900859752.pdf
    • https://static.usrfiles.com/ugd/ddb60a_f6317e139e8d4acc9f9b4b5eee99a330.pdf
    • https://static.usrfiles.com/ugd/63d3ad_0534c759f2b24f1c90efa58bf37f7cdb.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_off00004856.bin
c7b9f5c1c419fa43a8f6291586419ce3556b28d286fda8d4d136b116b2fe8d59
pdf-font-stream PDF embedded font (sfnt) at offset 0x4856 5516 bytes
font_01_sfnt_off00005b33.bin
2860ca6b704e31b35b2726ffbc86732a39f9ae8c1fbf55e3cb57c0cc3269bf56
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B33 9352 bytes