Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf62031b5375c81e…

MALICIOUS

PDF

33.7 KB Created: 2020-08-31 22:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14717c34f08b4ae977e4eedd0af112a3 SHA-1: 407a113461a7df376e015e73b0ba4a4c6dfbbec4 SHA-256: cf62031b5375c81eba6b140e06878d11af6eedfad89325e39c79d9ff472aa554
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=everlasting+god+william+murphy+sheet+music'. This URL is embedded within the document body, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious.

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=everlasting+god+william+murphy+sheet+music
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/noziwoxebodamotefupa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/avis_get_your_guide_cracovie.pdf
    • https://cdn.shopify.com/s/files/1/0440/5713/3221/files/pulepawopewubivalezi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1973/files/3d_tuning_free_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/guia_completa_de_calistenia_y_street_workout.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0489/files/wejafatubovewolusiza.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/21483558941.pdf
    • https://cdn.shopify.com/s/files/1/0435/7059/3955/files/7908558058.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/6129010275.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59854739703.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/beautiful_day_u2_chords.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/57571894762.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/50508155962.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_off00004580.bin
8e5be9bd1a56013dc5aecd3a6658eba48bc4f4fb0b346066a5568e57873a52ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x4580 5696 bytes
font_01_sfnt_off000058d3.bin
5bc3b6e9cf326460b712fd187ffc8f4e09d86d5a937771922c7c229163e8aedc
pdf-font-stream PDF embedded font (sfnt) at offset 0x58D3 9884 bytes