Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba97db099dd8405…

MALICIOUS

PDF

37.1 KB Created: 2020-08-01 05:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2eddb1ff1223d50ba12c3fb19c180c5 SHA-1: 7c3726e26ee56c30414e9ff115f1ad3c2bb52960 SHA-256: 0ba97db099dd8405b1e2371aea0cca453d83654a691dcc11f8182812d6841b14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body also contains a large number of embedded links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=choas+faction+2+hacked
    • http://files.rebeccahornbeam.com/uploads/1/3/2/7/132740778/7847954.pdf
    • http://files.chrischristodouloumybooks.com/uploads/1/3/2/7/132712251/dirokozuvak-lavijenax-gunonufuzokot-nepekamosurujo.pdf
    • http://files.simonleephillips.com/uploads/1/3/1/3/131381363/05b6b9894487.pdf
    • http://files.wired4successlifecoaching.com/uploads/1/3/0/7/130739525/fititariziz.pdf
    • http://files.goblin-king.co.uk/uploads/1/3/1/0/131069879/jovisirilarinuwo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/jipazajofunisinukukibep.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/58009476152.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/29246645352.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/856443963.pdf
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/80432958538.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/2181896150.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1059/files/42140047114.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/60210761811.pdf
    • https://cdn.shopify.com/s/files/1/0433/1362/7294/files/32373999137.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/53410422543.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/kajozemaratisapin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90675932679.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/lijapiwadanebumovog.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053c2.bin
58e749c55688dcb52c2ceb3652c5146d4e4e77b8f3a748a4c25f13d5844ce114		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C2 5080 bytes
font_01_sfnt_off00006507.bin
c48a25615b8a58fa8212370288f136ea55b4a484f1ee75eb91a029c8940cf665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6507 10228 bytes

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