Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f172ec151214c4c…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 12:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9da4e3019cac0c21af61229e2410e2cf SHA-1: 1f681bece109388c9b0ff53924d926a510b0ea92 SHA-256: 0f172ec151214c4c4e868d0fbdd50fdf53280fe4dcd390bb53382d46190c5d77
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and contains a link to a known malicious redirector, ttraff.ru. It also hosts a large number of other PDF files, indicating a link farm strategy. The document body itself is heavily obfuscated and contains embedded URLs, further supporting the 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.ru/pify?keyword=buck+boost+converter+simulation+pdf
    • http://files.vidlersautomotive.com/uploads/1/3/1/6/131636642/5cc768459.pdf
    • http://files.patsvision.com/uploads/1/3/2/6/132681647/1120289.pdf
    • http://files.thewellnesstraininginstitute.com/uploads/1/3/0/8/130814534/1234613.pdf
    • http://files.southcoastmamasandbabies.com/uploads/1/3/0/8/130874524/cd5ca6763.pdf
    • http://megagovi.sparkleaycliffe.com/uploads/1/3/2/8/132814930/3257798.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/xemozesajagexemuruvi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4098/1660/files/kasarad.pdf
    • https://cdn.shopify.com/s/files/1/0428/0025/1036/files/54045087733.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2156/files/alimentacion_deficiente.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/dabiropelegabifoviw.pdf
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/96916196687.pdf
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/safesopujurawiku.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/46462555871.pdf
    • https://cdn.shopify.com/s/files/1/0428/8449/7575/files/aeneid_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/rumozigiwomozutix.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/73171262263.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/trapped_in_the_closet_full.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a93.bin
23e49c1f445dd2dc1bd90b321809fc62d1d2113821debcbc774919bdb3a2e72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A93 5496 bytes
font_01_sfnt_off00005d22.bin
d27fb0005618f2d22f3c759971e2be79a42e4b08710f4466fb881d6834a7d14c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D22 8988 bytes
font_02_sfnt_off00007c1e.bin
203d4b37a4e38e27beb61eda8a086780d66c2d6e76bef79543a4dcf8b77e3798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1E 16076 bytes
font_03_sfnt_off000090c5.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90C5 4324 bytes

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