Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ff40f06f1a01ac…

MALICIOUS

PDF

55.1 KB Created: 2020-08-05 04:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85bfa01413791313c2d9c7fe94fbe796 SHA-1: cc13ee5bd41d37760ea1c6d4b335adbcba7583ce SHA-256: 00ff40f06f1a01ac94b517345fc137e69ac059c9043c36c261f571502ce2d2a7
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, disguised as an election result document. This is supported by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and the embedded URL pointing to 'ttraff.com'. The ML classifier also strongly indicated maliciousness.

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=election+result+2020+list+pdf
    • http://files.damascusbaptistchurch.org/uploads/1/3/0/9/130969712/sijada.pdf
    • http://files.sheridancollegemusic.com/uploads/1/3/0/7/130738928/6825335.pdf
    • http://files.rvadventuresutah.com/uploads/1/3/0/9/130968984/e507e88e86.pdf
    • http://vimudu.ronfrancisfineart.com/uploads/1/3/0/8/130814423/a36147.pdf
    • http://files.loneforestwolfphotography.com/uploads/1/3/0/7/130776486/weloritofikuke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nifafujejugafux.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/zozojuzen.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/36759939516.pdf
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/31003003466.pdf
    • https://cdn.shopify.com/s/files/1/0440/8596/9048/files/64480819144.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/47012010067.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24221046066.pdf
    • https://cdn.shopify.com/s/files/1/0439/0679/3627/files/80051799897.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/20640887401.pdf
    • https://cdn.shopify.com/s/files/1/0429/9381/1619/files/fujewagede.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/vufuvivamolawolebofid.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_off00008c8f.bin
e53eebfe5252d79a741fc747679e143d2b083e483041cd8768d4c29525a3373f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8F 5052 bytes
font_01_sfnt_off00009dc6.bin
0837d278b402e85754f5d2c4edea6fc0c21d5d4f25a366f6d2af7d80c5962e3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC6 10348 bytes
font_02_sfnt_off0000c11b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC11B 4324 bytes

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