Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c1ee7d60f86322…

MALICIOUS

PDF

42.3 KB Created: 2020-08-22 19:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f81328b7cfdd55b63a53a7818cbe356 SHA-1: 8e48d7322f57b8838886e5da2afa9cdbf7ae7a4b SHA-256: 03c1ee7d60f86322bb2677eddda592c9219cf95d187ff330d456ecd060caa3cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though partially obfuscated, contains text suggesting it is an annual report, likely a lure to encourage clicks on the malicious links. The primary malicious activity observed is the redirection to the `ttraff.ru` domain, which is flagged as malicious infrastructure.

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=il+domestic%252F+foreign+corporation+annual+report
    • http://files.thegoldminecircuit.com/uploads/1/3/2/3/132303378/e649b03db9.pdf
    • http://nezoturis.robertjsteel.com/uploads/1/3/1/6/131636725/wirarikamow-vorezul-kafudibafuduwu-baxafijisagagep.pdf
    • http://jozedo.walberswickferry.com/uploads/1/3/2/7/132741555/magebuzim-robevoz-bubowog.pdf
    • http://files.seedsofhope12.com/uploads/1/3/0/7/130739830/3776587.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0842/5123/files/bepozegevebedelurukegifon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/lirofitebeselejabigewo.pdf
    • https://cdn.shopify.com/s/files/1/0447/6190/7351/files/pathophysiology_of_congestive_cardiac_failure.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/gavalaril.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3014/files/electronically_sign_linux.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2516/files/phonics_world.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/jingle_bells_free_sheet_music_piano.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9605/files/danulikifakegapanomo.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005967.bin
f8a9108b4e8833daf9427697754d2375fe30af8efe47dd83ff2843df300e927e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5967 5332 bytes
font_01_sfnt_off00006b74.bin
1e78395f3e5633781b680518ebc603b43f89c3e0aedf49faa753624b12839856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B74 10164 bytes
font_02_sfnt_off00008e36.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E36 4324 bytes

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