Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8c5ea6390ef329…

MALICIOUS

PDF

44.2 KB Created: 2020-08-17 17:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 102d023bbcb14176a641ef0eb79aadaa SHA-1: 5858081fdfcd023f26966b5d873c267cab968745 SHA-256: ab8c5ea6390ef329fc26b712f05b8cf64540e53edb09f04eec2d86e9a27335af
152 Risk Score

Malware Insights

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

The PDF contains a deceptive title 'Bettors guide week 9' and embeds a large number of external links. One of these links, 'https://ttraff.com/pify?keyword=bettors+guide+week+9', is identified as a known malicious redirector. The presence of numerous links, many pointing to Shopify domains hosting PDFs, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious redirection 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=bettors+guide+week+9
    • http://files.wlschaska.org/uploads/1/3/2/6/132681304/donusavunufaze_ginipus.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/1657552650.pdf
    • https://cdn.shopify.com/s/files/1/0431/9445/0082/files/complete_guitar_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/unique_rpg_classes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/60911909663.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/jijodivanupezexalebusegap.pdf
    • https://cdn.shopify.com/s/files/1/0436/5221/9030/files/oxigenoterapia_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0441/2866/5752/files/piano_music_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/weber_spirit_e210_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/dagupe.pdf
    • https://cdn.shopify.com/s/files/1/0436/8669/0969/files/morirago.pdf
    • https://cdn.shopify.com/s/files/1/0432/2535/0301/files/15352192935.pdf
    • https://cdn.shopify.com/s/files/1/0437/5907/5477/files/comparative_and_superlatives_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6314/files/25955458272.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/wawamamufufotijufekegipe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ba.bin
75e9cfe19b45e1f4f267c823afbd45c32670b0d56764f189ba9631f090bd38d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x70BA 5112 bytes
font_01_sfnt_off00008247.bin
05adaefc656df15a1c79150666d20146e3b3eae1bbffb934ac7249f0f2e2f634
pdf-font-stream PDF embedded font (sfnt) at offset 0x8247 9936 bytes