Malicious PDF — malware analysis report

Static analysis result for SHA-256 628b56a075aeed13…

MALICIOUS

PDF

42.6 KB Created: 2020-08-20 13:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0c0ca2e023e6483bc346e5a713f3d73 SHA-1: bc359891f628b05a41d68a890db0c6ac40d449fd SHA-256: 628b56a075aeed1369e9ece55fc9c61f7911ee105119cf302b908e55851e27b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.ru/pify?keyword=love+birds+movie+tamil+songs. Additionally, the PDF is flagged as a link farm, containing numerous external links, many of which point to Shopify domains hosting other PDFs. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and several other Shopify links, suggesting a tactic to disguise malicious activity within a large number of seemingly legitimate links.

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/pify?keyword=love+birds+movie+tamil+songs
    • http://towew.winnipeghenna.com/uploads/1/3/2/3/132302984/a6712.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5796/1374/files/fairy_tail_213_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/side_effects_of_antiepileptic_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/gediregabovuseri.pdf
    • https://cdn.shopify.com/s/files/1/0437/6707/0877/files/bohemian_rhapsody_violin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/7612/2779/files/zupafazasogitipozodiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/3340/3285/files/foxtrot_uniform_charlie_kilo_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/21265227186.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9448/files/careless_whisper_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/36307538111.pdf
    • https://cdn.shopify.com/s/files/1/0428/7961/5142/files/probabilidad_a_priori_y_a_posteriori.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.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_off000067eb.bin
c84ebddbe36c22a5b950c1ea9c5e7fd49dfaca0f23081f27448c4cf46acc8760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EB 5284 bytes
font_01_sfnt_off000079d0.bin
ed6a29075f7c0b003a029cfce51877c28368538f8e6ea62ca9ed330cf87bb836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D0 10568 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.