Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0641084242e901…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 05:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1283eb3f688a98d7505fd41d40c0115b SHA-1: 1bdd4dc530793ae8ebcc1619337c77ba40b542bd SHA-256: da0641084242e901803043bae3be15b7c429d415aa07f53c30e937f38e1a27eb
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector at `https://ttraff.ru/wix?keyword=jolee+easy+image`. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, suggesting an attempt to obscure the ultimate destination or leverage benign domains for distribution. The document body, though heavily obfuscated, also contains the malicious URL.

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/wix?keyword=jolee+easy+image
    • https://cdn.shopify.com/s/files/1/0440/1351/9006/files/norirow.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/set_precision_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/41500177160.pdf
    • https://static.usrfiles.com/ugd/b8c837_afc8f188e4a548d1bacb7fcad7aeffd4.pdf
    • https://static.usrfiles.com/ugd/191a6d_89a9bcb7a00d4b06b568c39e824fd99a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0033ea4452db4d5b989bf92049294be2.pdf
    • https://static.usrfiles.com/ugd/5ed537_856524204ee84a5db21bb986a6defbb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_68e07adc3cec48a5ac8e7386976720b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5dee3ed256d4d3ba68fd5e3a17e7059.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/88875266083.pdf
    • https://cdn.shopify.com/s/files/1/0437/1732/9064/files/jejunoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2415/files/cub_cadet_tractors_with_loader.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/jijitolelasamam.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/regresyon_ve_korelasyon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d17.bin
4d348a68ff46b2ee6b01f255c688b34d3ed91ce2c351e71fae3ff53bde3bb466
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D17 4604 bytes
font_01_sfnt_off00006cbd.bin
e7e3be3fb39c4d272ac998aceb469622488ef36b552632e27af256958f9d79ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBD 11012 bytes
font_02_sfnt_off0000920e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x920E 4324 bytes