Malicious PDF — malware analysis report

Static analysis result for SHA-256 176c2add05afad13…

MALICIOUS

PDF

41.3 KB Created: 2020-08-19 17:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30baea5f84f8b5bfc6651c89c2eaa298 SHA-1: 2b023ea199732d314a547d049ededa372cc11432 SHA-256: 176c2add05afad13350b732910a83cf9b9176b1e00cb0dd19ab822db4003541e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or distribute content, with the primary malicious link pointing to 'ttraff.com', a known redirector. The document body, though heavily obfuscated, contains the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=oxford+collocation+dictionary+apk+unlocked
    • http://files.alexatamianphotography.com/uploads/1/3/1/3/131398406/8593783.pdf
    • http://waxoseguk.danmarinocards.com/uploads/1/3/0/7/130739964/guzijelebijomudejon.pdf
    • http://pitirago.slsphila.com/uploads/1/3/1/4/131408899/baruped-fafudapafir-mevaposujiwez.pdf
    • http://livep.kristamaysart.com/uploads/1/3/2/7/132740478/popivitetewepile.pdf
    • http://files.guldustah.com/uploads/1/3/1/3/131383453/wajamafifebovir_pesakoxidogak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/distance_learning_technology_resource_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8285/files/nugunoragopudazudaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/ielts_test_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/17387803742.pdf
    • https://cdn.shopify.com/s/files/1/0435/4090/6135/files/11141683161.pdf
    • https://cdn.shopify.com/s/files/1/0435/7246/1727/files/62906857324.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/nevufanibojepozifa.pdf
    • https://cdn.shopify.com/s/files/1/0448/1482/7677/files/b._p._ed_books_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/2152/3349/files/ruzaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/94961320919.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000631c.bin
84daf6ee93cdef72f9bc5bd47ca52d948d00b608483bba25dd84665aa15235d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631C 5232 bytes
font_01_sfnt_off00007507.bin
e9ba4ea250c0a2064b436f71965a533df7c6eaa7d037d1b6fd666d8a4a78973e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7507 10192 bytes

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