Malicious PDF — malware analysis report

Static analysis result for SHA-256 18eac9045a16a47c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 20:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7c63451030c187aeb2e9ce5444c4c27 SHA-1: 3bc64a1fe828142cba86e247786316acfa55c067 SHA-256: 18eac9045a16a47c507846259ec8a834dd785f5b769902d39eadaa1520e1f97b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=skype+business+download'. This URL is presented within the document body, suggesting a phishing or scam attempt to trick users into downloading potentially malicious content. The presence of a large number of external PDF links further supports a link farm or redirection strategy.

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.cc/wix?keyword=skype+business+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/bagpipe_sheet_music_for_itchy_fingers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/enable_ip_routing.pdf
    • https://cdn.shopify.com/s/files/1/0433/8699/4855/files/maytag_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/pixokiwedaj.pdf
    • https://static.usrfiles.com/ugd/e1c37d_c65869e0bdf1452e8bafd555253886da.pdf
    • https://static.usrfiles.com/ugd/3aee12_8dfc3b8e55624833ada2a3fb00f5b431.pdf
    • https://static.usrfiles.com/ugd/fe83c3_fe6b32afe8804738b50a74af49db20f2.pdf
    • https://static.usrfiles.com/ugd/a18aa6_63d6d71f569f4661bc88383949d22336.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4a378839d60410eb8dbaa4adbe5138b.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/79421037077.pdf
    • https://cdn.shopify.com/s/files/1/0434/0446/0188/files/45265410423.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2743/7467/files/bebujozagedufubogo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/catoosa_county_courthouse.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/62780836327.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_off00006964.bin
e51c125aaea74b3ea092c2233c7715136e9b181efcb366a8d5bb1f1dd84b4f19
pdf-font-stream PDF embedded font (sfnt) at offset 0x6964 5356 bytes
font_01_sfnt_off00007bbe.bin
adeac5b6f063cb685a2fcdf1b5e6b27d83125592334b9d99cad8735a2423648d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBE 9948 bytes