Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c7c3a96e620456…

MALICIOUS

PDF

51.0 KB Created: 2020-08-20 20:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2807b5a58e595531916fc501d835025 SHA-1: e3495664f3543db0d4ed039d493aed0ff88f31db SHA-256: 63c7c3a96e62045603aa893b6418af0ed7bca53fbea3a06ea7d5e65ff4e9ac79
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link leads to a known malicious redirector. The document body, though heavily obfuscated, contains the same lure text and the malicious URL, suggesting an attempt to trick users into clicking through to malicious infrastructure. 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=guide+taille+bonnet+b%25C3%25A9b%25C3%25A9+kiabi
    • http://lovul.lotusranch-homes.com/uploads/1/3/1/4/131454215/savupuvesun-jorunazan-muwamanija.pdf
    • http://wefupudep.pilgrimageoffaith.org/uploads/1/3/0/7/130739017/3775634.pdf
    • http://files.allisonjjanda.com/uploads/1/3/2/8/132814272/4721067.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/woruloxujijek.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5621/files/7267593847.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/tajirumolaki.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/nimalivisag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0523/8688/files/avadhuta_gita_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/68054658604.pdf
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/cheat_codes_for_gta.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/gobawofabal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/52350598316.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/landau_forte_sixth_form_ofsted_report.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_off00007950.bin
0cbc243fc5960cc4ce335e2a76a3fc55842989d6ae1aa2e0b98320b11026de08
pdf-font-stream PDF embedded font (sfnt) at offset 0x7950 4804 bytes
font_01_sfnt_off0000896f.bin
86465e0ead4d0c336f26f8ccb9a960c3394c96ebcbf55601b0b34462ed73135d
pdf-font-stream PDF embedded font (sfnt) at offset 0x896F 12016 bytes
font_02_sfnt_off0000af15.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF15 4324 bytes