Malicious PDF — malware analysis report

Static analysis result for SHA-256 787b75979036aef0…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 15:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b19e918f80cf57f3e772bf41c569eae5 SHA-1: 17f50902fa590ffb55618e36d6050800dc9a7ff8 SHA-256: 787b75979036aef0dff16fa27a146dff57343394a1f6c7ee036e4abd15acb785
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=exemplaire+certificat+de+travail+pdf'. The document body, though partially obfuscated, includes this URL and other Shopify-hosted PDF links, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=exemplaire+certificat+de+travail+pdf
    • http://files.charmayneadams.com/uploads/1/3/0/7/130739063/c02319918759cd.pdf
    • http://files.healthwisechiropractic.net/uploads/1/3/0/7/130776573/e48edf512b0b.pdf
    • http://files.mrsinigosmusic.org/uploads/1/3/0/7/130776661/bepatifupuxuraru.pdf
    • http://files.hansenbuildrestore.com/uploads/1/3/2/6/132696558/xaxebizanexoje_kesakasesel_nerodu_zekabole.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5491/6006/files/pevujowixisafafifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/38263739979.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/jawesuwajigajunizupag.pdf
    • https://cdn.shopify.com/s/files/1/0432/1679/7857/files/widixixir.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/fawajidiweruj.pdf
    • https://cdn.shopify.com/s/files/1/0438/5370/9472/files/rimworld_console_commands.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5934/files/62683364634.pdf
    • https://cdn.shopify.com/s/files/1/0432/2797/1741/files/puxefodod.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/98340338824.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/sivevigukew.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/adobe_acroiefavclient._dll.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/download_the_animator_s_survival_kit.pdf
    • https://cdn.shopify.com/s/files/1/0450/5419/7910/files/balanites_aegyptiaca.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3841/files/43667435371.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_off0000644c.bin
cdb6b7e8376a0d3818ad7afa762bb6756dc2fbb8f83d5b4a29e988afef46ed14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644C 5208 bytes
font_01_sfnt_off000075f9.bin
fac765b9dc4ddc96131516db0d1611807584c97d5c0e4f71595950b2024edaf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F9 11440 bytes

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