Malicious PDF — malware analysis report

Static analysis result for SHA-256 876c408f9f8aabb6…

MALICIOUS

PDF

43.0 KB Created: 2020-08-22 16:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f24fe0c3f5243f899cae1ccc59d1011e SHA-1: 99e8be98a30996608fd9289b3727face4cd6d8b3 SHA-256: 876c408f9f8aabb68f5518d1b741736f049c737311da9712ec3943df7068796a
162 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The document body itself contains text related to "Baidu browser for pc windows 10", suggesting a lure to trick users into clicking these links. The primary redirector URL identified is https://ttraff.com/pify?keyword=baidu+browser++for+pc+windows+10, which is a strong indicator of malicious intent.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=baidu+browser++for+pc+windows+10 In PDF document text
    • http://zusoviw.firstspeakers.ca/uploads/1/3/1/4/131437308/61b66d3ec87.pdfIn PDF document text
    • http://tokivi.chelledestefano.com/uploads/1/3/1/3/131380600/d262fba886797.pdfIn PDF document text
    • http://files.valleyriverdancers.org/uploads/1/3/2/7/132740498/eca75f4bf5c41.pdfIn PDF document text
    • http://gurik.plantshopyyc.com/uploads/1/3/1/0/131070590/voxipisijuwogu-nisonixebexade-gefotepevigode-pibuv.pdfIn PDF document text
    • http://fixozagov.arttherapycolorado.org/uploads/1/3/1/3/131379730/1815320.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/renujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/amber_run_i_found_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/zivovakubugenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxasukazojolivuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2640/7843/files/48316690300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/command_gcc_failed_with_exit_status_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/20084055899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/donisutenuxuzudujiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/lebemeguvevatitofetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/pesavafojemuzukefam.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

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000680f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680F 5592 bytes
SHA-256: 8148f11235966e5f9b1936be61bdabda06b46818f5a1b6218ce15f09c1920924
font_01_sfnt_off00007b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B32 10584 bytes
SHA-256: b37be07179ad039f7ce796ac6c1deb430c4f7753598174db9abdced5c8adcf7e

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