Malicious PDF — malware analysis report

Static analysis result for SHA-256 8107b7faf097f965…

MALICIOUS

PDF

46.7 KB Created: 2020-08-03 23:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83638eb193ec634f6d6cc88c644c8078 SHA-1: c92ca483adcdcb2952ea3f4737a78186baa91fa8 SHA-256: 8107b7faf097f965160967ed0ada7f4573ae572c1fa3f1cc94d7db0b00777706
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=tratamiento+absceso+bartolino+pdf`. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the same URL and other Shopify links, reinforcing the lure.

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=tratamiento+absceso+bartolino+pdf
    • http://files.murpthart.com/uploads/1/3/1/8/131857847/lebinuda.pdf
    • http://files.fundamentalnews.com/uploads/1/3/0/9/130969592/7194379.pdf
    • http://files.cedardifference.com/uploads/1/3/1/3/131380440/pufozumunegokufaxel.pdf
    • http://files.thevoicelabinc.com/uploads/1/3/2/6/132695829/vavixetazukin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3492/5463/files/zuwifefedupuzepisidiwar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7688/files/mugodumaxitiruta.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/kodowu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/54906534185.pdf
    • https://cdn.shopify.com/s/files/1/0436/2023/7475/files/tomorufarolu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/autometrica_pdf_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53551688275.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/tumblr_themes_max_davis.pdf
    • https://cdn.shopify.com/s/files/1/0436/4166/7734/files/13175982673.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/guxosofoxedugoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/10169948234.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/poziwalarezelejose.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/juvebewejijikamegamevo.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_off00007130.bin
a84b66ccccce57477d2be48fcab081aba9d4e568fd98c4d0463a5713eb221586		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7130 5392 bytes
font_01_sfnt_off00008364.bin
8d28aaf30be09e39bcc32dfe45154884babcd7f22006fbcfe5ae6e8057d20a17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8364 13084 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.