Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90f060bd2471132…

MALICIOUS

PDF

40.6 KB Created: 2020-07-31 22:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcd682b083f1aa01b830d7bfad5dd14b SHA-1: 53a0ae5bae9e5bbc8cbb6fa0fe60d115556b28f3 SHA-256: f90f060bd247113261d13528998cc1bccc4a704344bd268814d0bb9c13ba8c6e
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=arris+motorola+sb5101n', which is likely used to redirect users to malicious content. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malware or phishing lures.

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=arris+motorola+sb5101n
    • http://files.ninatongthaispa.com/uploads/1/3/1/1/131164555/latuzusavebidamefig.pdf
    • http://files.enhydracrew.org/uploads/1/3/1/3/131380558/gebizeparoziw.pdf
    • http://files.treasurevalleypressurewashing.com/uploads/1/3/2/6/132680986/ee1e0a7b5678.pdf
    • http://files.deeperstillmissions.com/uploads/1/3/1/3/131381151/4801000.pdf
    • http://files.lambdasigmaphi.org/uploads/1/3/0/8/130814342/rutaromazuses-wolewafes.pdf
    • https://cdn.shopify.com/s/files/1/0428/6418/1404/files/57029396463.pdf
    • https://cdn.shopify.com/s/files/1/0433/8440/6181/files/jeguwanukabaximaxogima.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gefoviliruvowej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6317908028.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/jitixuxob.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/witewutit.pdf
    • https://cdn.shopify.com/s/files/1/0435/4539/5368/files/61738934799.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/78403385521.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/31695383915.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/gafuzesa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/vaduvotemabudewusoli.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/zerumumunujesobunowufewap.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/98583406310.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_off000051e8.bin
49561df8804a975632e925bc6fb04646ccb444030643fb9233252ec854cb202b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E8 4948 bytes
font_01_sfnt_off00006293.bin
ee729934dbf11ea7e920e53a63f3777802b4daa5ae6cae82db6186c39b752603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6293 10448 bytes
font_02_sfnt_off000085f9.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F9 4324 bytes

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