Malicious PDF — malware analysis report

Static analysis result for SHA-256 d780b731b7138dad…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 06:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13be333d1c6c3f68e44b14ea72baaf98 SHA-1: 7362fc4d1d68446e9318303f9f79528eec005783 SHA-256: d780b731b7138dad031f792b6fc2764138034f4a0227c1a536a91b2cedd715f9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link within the document.

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=definition+of+training+program+pdf
    • http://files.reliablealliancefinancialllc.com/uploads/1/3/2/7/132740637/kapazezuzajitakixa.pdf
    • http://files.oursaviorelc.com/uploads/1/3/2/3/132303338/rowaponixekimo_widik_wavirudugage.pdf
    • http://files.primecleaningsystems.com/uploads/1/3/1/4/131453252/warapoza_vafab_jidopawivopofo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1048/files/nikaxijirifurozowupe.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/58179152716.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3203/files/66858509169.pdf
    • https://cdn.shopify.com/s/files/1/0431/4680/5408/files/jenodakotifide.pdf
    • https://cdn.shopify.com/s/files/1/0437/4262/5953/files/austin_kleon_steal_like_an_artist.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/apologize_song_by_one_republic.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/66872131322.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1568204463.pdf
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/centric_parts_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/bernina_bernette_334d_overlocker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/arcsoft_photostudio_windows_7.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_off0000622a.bin
183e52914d7f72d95da392e33e0e47b477cad1af8bec8700e81d7f2ebd366ef4
pdf-font-stream PDF embedded font (sfnt) at offset 0x622A 5148 bytes
font_01_sfnt_off00007399.bin
26686ac3ed6c9c0ea38f285a9666cfca12fadaf42c3e2858ecdf3c85826d62d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7399 9660 bytes