Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd228c64d4ee7b6…

MALICIOUS

PDF

42.6 KB Created: 2020-08-19 03:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efe6aa549f7e33f9239e21f5434a8f13 SHA-1: 366457fce64beee2542f1ddc9d81c8e3fdfb2ed7 SHA-256: ddd228c64d4ee7b6c2e7687304ed68421bc2000fd4587f2a29851ff4f4510076
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains multiple embedded links. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=boot+manager+donator+apk'. Additionally, the document exhibits characteristics of a PDF link farm, with numerous links pointing to other PDF files hosted on various domains, including Shopify. The presence of these links suggests an attempt to lure users to malicious content or to obscure the ultimate destination of the malicious redirect.

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=boot+manager+donator+apk
    • http://sexiwo.newyorkvideoproductions.com/uploads/1/3/1/1/131164239/c363c660.pdf
    • http://files.confluenceresort.com/uploads/1/3/1/4/131483371/xeguf_kamom_bemumareximu_powuk.pdf
    • http://files.salinemusicboosters.org/uploads/1/3/1/4/131452735/purezitewofo.pdf
    • http://files.arthurmorgan.co.uk/uploads/1/3/2/6/132695543/folobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4898/3959/files/wicht_yoo_hee.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/romujedavujegopefevola.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/vifizikokoxetit.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/canciones_de_guitarra_para_principiantes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1473/3480/files/74824709463.pdf
    • https://cdn.shopify.com/s/files/1/0429/0635/3823/files/english_beginner_reading_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/darulifipisitukezipidub.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2480/files/6627220082.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_off00006885.bin
c60163f458addb7d4fa51947eb2bbebe42dbf7d39ced2b95a1e18df1edd3067f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6885 5180 bytes
font_01_sfnt_off00007a03.bin
543b05d6200b4652e3ebac4918bd4495b2b885b68027a9e267e658a13e577698
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A03 10616 bytes