Malicious PDF — malware analysis report

Static analysis result for SHA-256 18fbb7ae1ae22bc7…

MALICIOUS

PDF

49.8 KB Created: 2020-08-22 01:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bf7f7d266040f8f9349643b26e3ccdc SHA-1: 53253b13122a653efedbb384809b095f115b2263 SHA-256: 18fbb7ae1ae22bc7da556c26ef285f872654aa55a726eb821a013dad37fb06a7
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link redirects to known malicious infrastructure at 'ttraff.ru'. This suggests a phishing or scam attempt, leveraging a seemingly legitimate document to trick users into clicking the malicious URL. 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.ru/pify?keyword=corsair+lighting+node+pro+installation+guide
    • http://zodugojef.functionalfitness.ca/uploads/1/3/0/7/130776486/getozuberisegij-zutexejenipov-votufuzizajobug.pdf
    • http://files.800logiccor.com/uploads/1/3/1/3/131379343/zanadumawag-zasiku.pdf
    • http://files.treasuresofclay.com/uploads/1/3/1/4/131455621/5854ad1e3234b3b.pdf
    • http://files.harvestbaptistchurchmd.com/uploads/1/3/1/4/131452942/filatolef.pdf
    • http://files.youngachieversokc.org/uploads/1/3/0/8/130874009/a02d34a3a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/os_x_10._10.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/exercises_present_perfect_affirmative_negative_interrogative.pdf
    • https://cdn.shopify.com/s/files/1/0428/8551/3379/files/nusugogazarimivanu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/commonlit_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0462/7241/3856/files/bedubapizow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/linux_server_administration_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4440/files/51536158340.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/3536584530.pdf
    • https://cdn.shopify.com/s/files/1/0451/6613/3397/files/accountable_talk_sentence_stems.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/ca_driver_s_handbook.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_off000085cc.bin
e91f53418180ad30ebe7b63e67e321584dcf649549f67f52477cd9da7880f98f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CC 5124 bytes
font_01_sfnt_off00009728.bin
752bea534778d03b4dd7a0cc6b4fb871f42dc7255d0d90109777a93c1e2ff3f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 10284 bytes

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