Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fde72bd2182b69…

MALICIOUS

PDF

64.5 KB Created: 2020-08-18 22:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa91f9123c9faa268cfaafa6ccdd9a61 SHA-1: 440b147f44e28e10cb19bd95ab078b198ffb97d5 SHA-256: 10fde72bd2182b6969a11c099f56ed430fb2387874cfbcfb818acd73f3f961ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to 'metric unit conversion capacity worksheet' and the malicious URL, suggesting a lure. The presence of numerous external links, many pointing to Shopify domains, indicates a potential link farm used for SEO poisoning or distributing 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.com/pify?keyword=metric+unit+conversion+capacity+worksheet
    • http://files.mandarinworld.net/uploads/1/3/1/8/131856574/4699230.pdf
    • http://files.andersonpsychassoc.com/uploads/1/3/2/6/132681322/noguforut_vujoturerug_gazovajaz.pdf
    • http://vukizuzu.menengagedelhi.net/uploads/1/3/0/7/130775573/bc1f523a0fdc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/12269072054.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/bijobekifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/5530/7159/files/lasixerizomofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/tolkien_beowulf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/dnd_5e_oathbreaker.pdf
    • https://cdn.shopify.com/s/files/1/0440/5189/0341/files/danevaloxixel.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/kozatixes.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/18521395010.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_off0000b31f.bin
3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xB31F 2828 bytes
font_01_sfnt_off0000bd1a.bin
3dad08ce30be9eb3af4224c0fbec4cbf7290f29a841216c99d03a0c7f7eaa82e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1A 5312 bytes
font_02_sfnt_off0000cf54.bin
ce2a70b43c3a531a5db5d9cc9ed24361643182227a473cae61edd63a5e8bca22
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF54 10528 bytes