Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3567e3d5f3c4b7…

MALICIOUS

PDF

44.3 KB Created: 2020-08-20 08:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b353004661cfd102e9df2d582258f95 SHA-1: 0d4b2c7678c31f6e73243751e3805a9ce793f3a4 SHA-256: 3d3567e3d5f3c4b765e108cad160e0742955a714a5370c375a606df96f16a58b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a keyword related to anime. This suggests a phishing or malware distribution attempt. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely to improve search engine ranking for malicious content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a malicious intent.

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=anime+beelzebub+episode+1+subtitle+indonesia
    • http://galeto.fairwindstables.com/uploads/1/3/0/7/130776791/ritimapafipav_sidos.pdf
    • http://pomaxaki.lottamoberg.com/uploads/1/3/0/7/130776255/jisovefatipol_novotinutogitit_sipusivobaziv_wunix.pdf
    • https://cdn.shopify.com/s/files/1/0439/0073/1547/files/morijolubibedepinegesulu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4388/8023/files/rugelex.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/the_pardoner_s_tale_translated.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/robotics_engineering_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/3000_chinese_character_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0428/4999/2870/files/46702667928.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/heart_failure_physiology.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/17645145260.pdf
    • https://cdn.shopify.com/s/files/1/0439/0758/0072/files/manual_cultivo_de_arveja.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/vixixigilipelidaba.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_off000063e4.bin
f63df854d81215e28ad96fe5d315bc4311360283feab34f784e5403af3a1fff4
pdf-font-stream PDF embedded font (sfnt) at offset 0x63E4 5124 bytes
font_01_sfnt_off00007530.bin
4aa364d1272795adcbf07f60d425f84e0ce81fcd798ddc925a5e18346a3cec69
pdf-font-stream PDF embedded font (sfnt) at offset 0x7530 9692 bytes
font_02_sfnt_off00009639.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9639 4324 bytes