Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0c6e6b356a8d47…

MALICIOUS

PDF

33.8 KB Created: 2020-08-18 18:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da3eef4c276217322c439a7caa4ddb86 SHA-1: 07f8735b75e32e29f05f14648ff3879e76c75720 SHA-256: 3d0c6e6b356a8d4798107a510ffbcb5115b7e2401369d9a741df90b54cb574b2
172 Risk Score

Malware Insights

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

The PDF is designed as a screenshot lure, presenting itself as a worksheet but containing a hidden clickable link. This link redirects to malicious infrastructure at 'ttraff.com', indicating a phishing or redirection attack. The document also contains a large number of external links, many hosted on Shopify, likely for SEO poisoning or to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 33 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=graphing+ellipses+worksheet+pdf
    • http://files.tuiridgeaustralianlabradoodlesnz.com/uploads/1/3/0/8/130814205/449495847718928.pdf
    • http://kakejowaj.pinktuliphotel.com/uploads/1/3/0/7/130775503/dusilijituvive-tovogirezore-namiribasiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/medarovadujagowurevasote.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/the_alchemist_full_book_free_download_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0452/1892/2653/files/carduelis_cucullata.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/lexasowazokiguzuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/free_printable_december_2020_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/bugejudaxuzopixotexijaxul.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/how_to_stop_avast_popups.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/89587196033.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_off00003f16.bin
0f893a0e594585b3c22138d6c5d1eb17d2a3796c0155d51819c1cfd50bc71d89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F16 5276 bytes
font_01_sfnt_off00005116.bin
c7eb78a733e4bdd596af78832efecaee7a067d42143944f28a55cce6d8d44fe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5116 8192 bytes
font_02_sfnt_off00006cfc.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFC 4324 bytes

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