Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f48eddfc76d0d8…

MALICIOUS

PDF

47.2 KB Created: 2020-08-19 05:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 123e8d8b0b0b17e1989c49b3c59efe44 SHA-1: 456f2a1565e08399f7c1229a07227b36d4f49c89 SHA-256: 16f48eddfc76d0d83291633a1cdd454020ec7efec1d0abcd63efb13a10d57798
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=p55nf06+mosfet+datasheet'. The document body, though heavily obfuscated, appears to contain text related to a MOSFET datasheet, suggesting a lure. The presence of multiple external PDF links, some hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector or distribute further payloads.

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=p55nf06+mosfet+datasheet
    • http://files.lonestarcarpetcare.com/uploads/1/3/1/3/131379578/tokimefuv.pdf
    • http://files.carolinescandlecompany.com/uploads/1/3/0/7/130740177/6290692.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0440/3360/5797/files/70188842819.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/85371198809.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/gofetafa.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/14653222158.pdf
    • https://cdn.shopify.com/s/files/1/0438/0242/7554/files/gudetam.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/agnes_of_god_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/sand_blasting_machine_ql_1006.pdf
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/gogaragasaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/pominefuw.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_off0000682a.bin
ce27223ddc847e99f02ebb20282b98caefe695944579d9b80a0226135557d12c
pdf-font-stream PDF embedded font (sfnt) at offset 0x682A 5440 bytes
font_01_sfnt_off00007a7f.bin
b31c35d35411283a369370ed5ede0b0e80d26eb0e9aac1906b2cc88018de89aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7F 17264 bytes