Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab3050c97cf66d5…

MALICIOUS

PDF

45.8 KB Created: 2020-08-07 02:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d17dbe4fff6e5209866396437e4520c SHA-1: 7d10a9202672bd009fb01c5990cda6b0d65528fd SHA-256: 7ab3050c97cf66d5314260bd9e0d51678f08d2818efe2d6f5330448ac5def1c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=blended+wing+body+design+pdf', suggesting a lure to download a file. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=blended+wing+body+design+pdf
    • http://files.how2bounceback.com/uploads/1/3/0/7/130739809/be6250.pdf
    • http://files.mymagicspoon.com/uploads/1/3/0/7/130739202/gixovitawu.pdf
    • http://files.fishingtourismkefalonia.com/uploads/1/3/2/8/132814589/3222201.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/7586/9599/files/fundamentals_of_physics_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11286786524.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/49018234118.pdf
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/watumulikadezumizisupibit.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1959/files/famefofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/87618945588.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/fenomonebikas.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/49332953666.pdf
    • https://cdn.shopify.com/s/files/1/0428/8351/4527/files/77451514667.pdf
    • https://cdn.shopify.com/s/files/1/0436/4868/0089/files/english_club_grammar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067b0.bin
93368d0b7791d30cb483f6c193dd22a75093e504fb173acc95df0def1ea2311b
pdf-font-stream PDF embedded font (sfnt) at offset 0x67B0 4996 bytes
font_01_sfnt_off000078c9.bin
b02ef71387a4c477ea0a5a07f3f911cc07d14092c861d0a38f790597339a4c39
pdf-font-stream PDF embedded font (sfnt) at offset 0x78C9 10452 bytes
font_02_sfnt_off00009c88.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C88 4324 bytes