Malicious PDF — malware analysis report

Static analysis result for SHA-256 881053cdf119b11a…

MALICIOUS

PDF

63.5 KB Created: 2020-08-22 17:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dde174c33356d74f3395cca8f487d20 SHA-1: ca46370aa8531aec661b13173a8dc0ea072ac096 SHA-256: 881053cdf119b11aef48f2b8a9664cba75051cc061b6dc1648a372dfe3eb8514
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/pify?keyword=ben+10+cartoon+game'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=ben+10+cartoon+game
    • http://files.maclachlanmeadows.com/uploads/1/3/0/7/130775604/jewojetigimef-puwilipo.pdf
    • http://files.nevisatnight.com/uploads/1/3/0/7/130775992/4c9e4d4de54.pdf
    • http://files.sunshinegirlabroad.com/uploads/1/3/0/7/130738956/0a330bd679.pdf
    • https://cdn.shopify.com/s/files/1/0452/8193/5522/files/bartolome_de_las_casas_obras.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/41178136859.pdf
    • https://cdn.shopify.com/s/files/1/0435/7357/5841/files/78263268886.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7122/files/gemikilanodenudimevele.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0428/1014/6983/files/beginner_vocabulary_test.pdf
    • https://cdn.shopify.com/s/files/1/0438/7074/8827/files/havering_sixth_form_college_entry_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0438/6275/3445/files/audacity_lame_windows.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/vekurajemagizefagafo.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/
    • https://cdn.shopify.com/s/files/1/0452/8193/5522/files/bartolome_de_las_casas_o

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aea8.bin
f49b6fc253d83da838cdd741538a3a8abd47e8071ddc10a19d521767812c1534
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA8 4892 bytes
font_01_sfnt_off0000bf24.bin
9f5f5775bb345672d1c951ed3c567cf14858858121e516e1c8aba7763f72b131
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF24 10504 bytes
font_02_sfnt_off0000e326.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 4324 bytes