Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ff187658c47d64…

MALICIOUS

PDF

50.3 KB Created: 2020-08-30 12:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfd82c0c0557ee1878e50f4439d238f6 SHA-1: da732cf72c814f2df09eb1841fc774bbc9a54354 SHA-256: f7ff187658c47d64c957bf8a4f898afcc7de9aee1bf14c407365aedac209a0ec
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, characteristic of a link farm. The embedded URL 'https://ttraff.ru/wix?keyword=coches+de+roberto+mendez+delgadillo' is the primary indicator of malicious intent, likely serving as a lure or redirector.

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=coches+de+roberto+mendez+delgadillo
    • https://cdn.shopi
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/biomagnetismo_holistico_manual_practico.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/85940843636.pdf
    • https://cdn.shopify.com/s/files/1/0438/9427/6264/files/affinity_photo_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/13574870259.pdf
    • https://static.usrfiles.com/ugd/b8c837_c687637e74f74d27a788dbd22bed4b5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_644874d072f9467a806dec1082909a57.pdf
    • https://static.usrfiles.com/ugd/1decf9_15e9fe1d45e74002a2117a31f0b5c49e.pdf
    • https://static.usrfiles.com/ugd/72216b_19d6e48a6b8d47aaa86a76399b74b8b4.pdf
    • https://cdn.shopify.com/s/files/1/0460/0781/2257/files/legekoxevolupuvixuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/ceftriaxona_ev_bula.pdf
    • https://static.usrfiles.com/ugd/735189_66ef3eafd1b8420ea26232376e944488.pdf
    • https://static.usrfiles.com/ugd/a48928_f2293b1d2f50475996cd50efb5da5a55.pdf
    • https://static.usrfiles.com/ugd/868401_98ad1bcb203445069584a214d63e5989.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e91c8ffad224240b9b6ae6b2fc36491.pdf
    • https://static.usrfiles.com/ugd/c5d40f_5597762f3f22430a83efdc513f8aaa51.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_off00008387.bin
bade5a3357d04af8e8582ff0f9c9813eb3c18a3e03ec149476711b0fd1fd1b8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8387 5448 bytes
font_01_sfnt_off000095e8.bin
a7f9157c07549ba48b2bfb4c5121da7652b3c11872ede0ad0c517878918f9c51
pdf-font-stream PDF embedded font (sfnt) at offset 0x95E8 11128 bytes