Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b51a70729cc390a…

MALICIOUS

PDF

40.1 KB Created: 2020-08-10 22:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 889a88a427e6f9997301c913e43daa19 SHA-1: 6e17d2859a7a7760579d64f8bdabe6abaa820f7a SHA-256: 0b51a70729cc390af16c1f816292bd39ecf6c857039dbc469960e4ca5e399a32
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to malicious sites. The document body itself contains the URL https://ttraff.com/pify?keyword=symmetrical+shapes+worksheet+pdf, reinforcing the malicious intent. No scripts were extracted, but the presence of numerous links and the redirector indicate a phishing or malware distribution attempt.

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=symmetrical+shapes+worksheet+pdf
    • http://files.oceanstatelaundry.com/uploads/1/3/2/6/132682802/doteganawur_dodotugawa_nabok.pdf
    • http://files.dreamincolorllc.com/uploads/1/3/1/4/131438899/wixizebato_dafomuno_simisevona.pdf
    • http://files.christinabarsi.net/uploads/1/3/1/3/131398489/sivafujoronodifuxo.pdf
    • http://fuzan.garybachers.com/uploads/1/3/1/4/131453062/dulowutimej-tumixatitateke-zizijutuxik.pdf
    • http://files.writerial.com/uploads/1/3/0/7/130740530/mobakamovi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7228/0981/files/wepoken.pdf
    • https://cdn.shopify.com/s/files/1/0433/9286/0327/files/medenikunasos.pdf
    • https://cdn.shopify.com/s/files/1/0437/2919/1066/files/consonant_blends_activities.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/kik_messenger_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/88659053267.pdf
    • https://cdn.shopify.com/s/files/1/0437/1110/3128/files/biological_science_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/mit_math_for_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0437/2434/1400/files/kixol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9777/files/9476996501.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6599/files/92307568685.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/99239364255.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_off00005db1.bin
ac748bb0b095299ffb3ce91bcceca9301f4f1b190069c30c703409be7ef0918b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB1 5756 bytes
font_01_sfnt_off00007130.bin
458340e5e6ca75100ff15b7f61de7dd89a497dc8933465156cd837432c4020c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7130 9988 bytes

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