Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ef1c1bb4f4e902…

MALICIOUS

PDF

50.2 KB Created: 2020-08-18 23:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d05dc54dd0fc0a23dc071548de974296 SHA-1: cd98679a0034a7d0d189e117754a7dfbda19d06a SHA-256: f0ef1c1bb4f4e9026e36b1091e7c3a908f9f71cc5f0447f38c5b9591e5c110ab
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a certificate template, aiming to lure users to a malicious site. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=certificate+templates+pptx', which is flagged as a known malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links pointing to external resources, many of which are hosted on Shopify domains.

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=certificate+templates+pptx
    • http://penufawem.unlimitedpotentialstl.com/uploads/1/3/2/6/132681647/7313179.pdf
    • http://boxiri.sspres.org/uploads/1/3/0/9/130969335/fijonifefitus.pdf
    • http://xowar.iamrogerwebb.com/uploads/1/3/1/4/131482952/vusoxajuxote_kepezawi_rurilarek_situl.pdf
    • http://files.thenerdshelves.com/uploads/1/3/0/7/130738596/wiwomifube-xerefiluk-zitilar.pdf
    • http://files.sterlingsfiberglass.com/uploads/1/3/1/4/131453436/tizakutobafedewumor.pdf
    • https://cdn.shopify.com/s/files/1/0431/3979/3050/files/wupipegemulajuvapip.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/jinedobumubufedikem.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/14652130060.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/interrogative_adjectives_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/6405/6225/files/9863725687.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/75216629451.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/28717009401.pdf
    • https://cdn.shopify.com/s/files/1/0430/6075/6641/files/80437825269.pdf
    • https://cdn.shopify.com/s/files/1/0429/0225/7823/files/laxidumefow.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/14653536263.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/39037494693.pdf
    • https://cdn.shopify.com/s/files/1/0431/1154/7036/files/rofobamiremefizaze.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_off000078c2.bin
b73c05e2cecfae5afcb99a2f6bf80d4270b864de75c4467498eac982c202dafc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C2 4824 bytes
font_01_sfnt_off00008928.bin
7930a9036ba0eae1c84a422081e94315871901d5aaec4723be4f3d374ba11db1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8928 10860 bytes
font_02_sfnt_off0000ad35.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD35 4324 bytes

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