Malicious PDF — malware analysis report

Static analysis result for SHA-256 8efc607f2b733134…

MALICIOUS

PDF

48.9 KB Created: 2020-08-06 00:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5393d02b4ace15da0e77382d91ff1ea SHA-1: a0c8174f4d1822e2b70b423bdc8b2b95a54052a7 SHA-256: 8efc607f2b733134c97c675e9c18c8756ccbd3f0ccbb2e05d4f340ae884428c5
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. This indicates the document is designed to lead users to malicious sites. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the ultimate destination. No scripts were extracted, but the primary attack vector is the malicious URL.

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=manual+dos+recursos+araken+de+assis+pdf+download
    • http://files.josepblas.com/uploads/1/3/1/4/131437268/kiwinorubidosa.pdf
    • http://files.massagechinese.com/uploads/1/3/1/3/131398113/doniferofuvanasenade.pdf
    • http://kapijura.anajazphotography.com/uploads/1/3/2/6/132695569/poruxaj-bamux-janudilonex-gulokotirabi.pdf
    • http://files.kidsnchordsmusic.com/uploads/1/3/1/4/131437981/naworunapatudomefibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0436/6961/8841/files/toverolopomawibewemomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/galokaratowuvaruwo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7151/8373/files/gutox.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/wonirelusanesusipozaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/6997/9289/files/7933061272.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/68539796234.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2321/files/xezuzatiwiduvof.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9030/files/d_d_human_variant.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/demivixawa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/wogezavajakojusob.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/bewutazelugepabuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7091/files/cma_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/5353/7685/files/barriers_to_entry_definition.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_off00005dc6.bin
7fe2e968c9e2534c4f9bc2fe87f7077dad1dd41302bcbe8941f7bd00c3393732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC6 2008 bytes
font_01_sfnt_off0000670e.bin
4cc42f598038cf95cab2db743294173ee192dd25940e3fd0fdd400ebacbc005f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670E 5312 bytes
font_02_sfnt_off0000794f.bin
603a363c323bcda84dcf3a34de89e2a289eccefcc4160ad03d04225fa210d8f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x794F 12172 bytes
font_03_sfnt_off0000a08a.bin
5d067f3ed25c947100d6e11befc4ff8f2526c29946dd398e4c33d9c92d35bad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA08A 16092 bytes

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