Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40b7388f17db96b…

MALICIOUS

PDF

82.3 KB Created: 2020-08-21 10:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11026c66eb5a8e7f209d62056d049800 SHA-1: 3baad81bd0d9190b05123e922d0f1988d3ddc6de SHA-256: e40b7388f17db96bdb2e9b906b71093a3ec1c85d9bfb1bdbf43533243861d9e9
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=weather+report+black+market+songs'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to lure the user to malicious infrastructure.

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=weather+report+black+market+songs
    • http://texata.goodheartedgang.com/uploads/1/3/0/9/130969264/6683830.pdf
    • http://sobevuk.jakob-israel.com/uploads/1/3/2/3/132302978/ritotewapekeseb-polawewo-raduve.pdf
    • https://cdn.shopify.com/s/files/1/0428/2204/1767/files/background_images_hd_1080p_free_2019.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/broadbent_fold_school_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/49735292596.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/35194696115.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/neck_and_upper_back_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/bloccare_aggiornamenti_applicazioni_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/4466/6529/files/gutujujidupa.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/family_bunker_plans.pdf
    • https://cdn.shopify.com/s/files/1/0438/9899/4856/files/95586189097.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0981/files/beginner_vocabulary_exercises.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_off0000f04c.bin
7e82d532c26414170a19c0c5b170a20188f9db35b6bea15a0452189cac13d704
pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 5564 bytes
font_01_sfnt_off00010320.bin
3c35e9075563480145c6f0fd09a87677f1ba1418e750a844274740f2cfcd5c7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10320 10716 bytes
font_02_sfnt_off0001272f.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1272F 16092 bytes