Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d37960302321e6…

MALICIOUS

PDF

49.7 KB Created: 2020-08-08 20:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38cba612c8612e70890a995ac715f991 SHA-1: dc4288497076b2b5bf5411831e6ed3d2b1898c6e SHA-256: b0d37960302321e6361fd9bd8ecd7a937c390f1bec2dc8a4a079b516446da386
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=articulaciones+uncovertebrales+pdf', which is flagged as malicious. This suggests the primary intent is to redirect the user to a harmful site, likely for phishing or malware distribution. The presence of numerous other PDF links points to a link farm strategy.

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=articulaciones+uncovertebrales+pdf
    • http://files.penntownshipfire.com/uploads/1/3/2/6/132682048/d616a9d3f67ae0.pdf
    • http://files.officevalue.net/uploads/1/3/0/7/130739919/riratugutemuze.pdf
    • http://files.straightlinedancefitness.com/uploads/1/3/2/6/132681513/tugotimito.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/defipoduxemenoninal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87678197609.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/sedentarismo_oms_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9073/files/zikuvelaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/37894306038.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/28657482701.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/xuluv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8697/1029/files/42417103376.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/8045585393.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faxusumowavunisipor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/somerurunem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/koresapanuxugez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9204741539.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/44730100676.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/notebogibow.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064e2.bin
44ae8c81d5016f147eab1f52c23c7753ca17458d7c4b7e08f848567ecc188f4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E2 5340 bytes
font_01_sfnt_off00007714.bin
1f756b46481ac718095810e133e155ec1caf818687d25c20e8b002f727d713c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 2116 bytes
font_02_sfnt_off000080c0.bin
4641b1f219fc262b87468b8fb624224c843eb8dbf997d7ff63fe013364f56302		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C0 10040 bytes
font_03_sfnt_off0000a351.bin
e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA351 16168 bytes

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