Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b8fd54ab14b206…

MALICIOUS

PDF

35.1 KB Created: 2020-08-30 01:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d63dedb071ec6df7e8f9d92442fba1c9 SHA-1: d220549f1680d16abfcb1905b90d25e39013f91f SHA-256: 58b8fd54ab14b2064538e9b761ae264c83a027bf7bc78ccf90b6259729ddf7f2
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 large number of embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the malicious URL. This suggests the primary attack pattern is to lure users into clicking malicious links, likely for phishing or malware delivery.

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=eso+magnum+shot+or+draining+shot
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/dotixanojojusefirixikesov.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/xutibumixowodumigele.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/rovepuxibawawiguwekazapu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0418/9096/files/dodagotani.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/fafsa_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/animal_crossing_new_leaf_rover_face_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/6466783709.pdf
    • https://cdn.shopify.com/s/files/1/0435/2085/2122/files/90490293903.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9283/files/manolovusidowenesulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/types_of_blood_cells.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/66342336941.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/26568611296.pdf
    • https://static.usrfiles.com/ugd/b8c837_31facdb28ae3470c841cfb5e3d84d451.pdf
    • https://static.usrfiles.com/ugd/756799_4b96441629e348ab93b87781d47087f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0c65c70e16f4fe5ba5ff88e5841a6e6.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_off00004cae.bin
7e4e018151924682ba3800278fbdf2bc37e3052ceffce1390952ade18e126dba
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CAE 5164 bytes
font_01_sfnt_off00005e0b.bin
5d120058fa473b4270e1fb36980c051b75572996528532e19f328bb1d0934043
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0B 9884 bytes