Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa0703b73487c94…

MALICIOUS

PDF

32.9 KB Created: 2020-09-01 11:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9e34811817090bd9c8dc165742dbc84 SHA-1: f64d99f0e7757ae0924343888713ef518e4a2bd4 SHA-256: bfa0703b73487c94d29fa9449539d4014f7901b8412cef4b6d1f311f2e0c829a
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign content, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=biblia+vanzarilor+jeffrey+gitomer+pdf', suggesting a lure to download a book. The presence of a malicious redirector indicates the intent to lead the user to a harmful destination, 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.club/wix?keyword=biblia+vanzarilor+jeffrey+gitomer+pdf
    • https://static.usrfiles.com/ugd/455f95_db9cf526cc384aaea7bf774341486cc6.pdf
    • https://static.usrfiles.com/ugd/07e02c_e1c133fbdb924740b014b31bae385d34.pdf
    • https://static.usrfiles.com/ugd/63d3ad_ccaa1580f7c74d3f85d864da873e8cb4.pdf
    • https://static.usrfiles.com/ugd/269bb8_b58337032d75499db0f7e6e9f1ca2509.pdf
    • https://static.usrfiles.com/ugd/33a16d_bc03166219134dd0a210db51dff7c803.pdf
    • https://static.usrfiles.com/ugd/bd5c68_c5408c4ff41449b79cd1ffd21fa9f3bd.pdf
    • https://static.usrfiles.com/ugd/48d9a1_4d1adc385c104d2eafba3b8fc1396e83.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6162e7ae99f4d2786f0eabd5d9605a5.pdf
    • https://static.usrfiles.com/ugd/65b209_e3eba0fc31424e8faf735abdd7d63152.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/end_of_module_assessment_task_6.3_an.pdf
    • https://cdn.shopify.com/s/files/1/0430/8271/1201/files/37558721599.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/toxina_botulinica_espasticidad.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/android_serbian_cyrillic_keyboard.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_off000042ce.bin
5e1ab213508933862c3e55cb91a295d04914e6ed4042adefbf05c3ab44537c19
pdf-font-stream PDF embedded font (sfnt) at offset 0x42CE 5660 bytes
font_01_sfnt_off0000561a.bin
375fa42c1096143b70e841fc3553701abdfa2b707fb4479edcb8b4e2cc4379fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x561A 9552 bytes