Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1164fcebdf81e73…

MALICIOUS

PDF

48.7 KB Created: 2020-08-14 22:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81f534c79411fc1598de346025e31906 SHA-1: 070ae9ca7613ad5a310aa5eb06dac348ff252ec3 SHA-256: f1164fcebdf81e732b9d079765f759030066a06eb93989827b926dd445144acf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file exhibits characteristics of a link farm, embedding numerous external links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=best+default+alarm+sound+android'. This suggests the document's purpose is to lure users to potentially harmful sites. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=best+default+alarm+sound+android In PDF document text
    • http://files.didistutter.org/uploads/1/3/2/7/132712015/33918117.pdfIn PDF document text
    • http://files.oakhillsoregon.com/uploads/1/3/1/3/131378942/5083474.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/67991586332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3106/8825/files/penndot_address_change.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/wakojexixuziju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/18506140706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/58430046111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2334/2495/files/75454853949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/85348703305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/doveditowidas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/nifipemabipunalor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/fluke_179_multimeter_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/4346060069.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: didistutter.org 4 samples

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7421 4984 bytes
SHA-256: 59ea2b1ecdd5174e4ea18208345db29b90a69236382fbb57b2d22110072fc817
font_01_sfnt_off000084f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F1 10144 bytes
SHA-256: b1a74b846a513514b1dcb94bc4705897a645119c880bc3264d1babdee0dab692
font_02_sfnt_off0000a7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7AD 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.