Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d6d394aeb5ae56…

MALICIOUS

PDF

43.5 KB Created: 2020-08-15 06:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e02aa894dd8b88f772b9bdcad9c082e SHA-1: f233236c1cdbef543678495a5eb82a3ff92586aa SHA-256: 99d6d394aeb5ae569d1be419e847528d0f5ccf875829e633824f7b742a7780af
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains text related to 'Instagram apk new version 2019' and the malicious URL, suggesting a lure for users to download potentially harmful software. The presence of a malicious redirector link indicates the primary intent is to lead the user to a malicious site.

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.cc/pify?keyword=instagram+apk++new+version+2019 In PDF document text
    • http://files.naturecoastdecorativeartists.com/uploads/1/3/1/6/131606035/8416c9e4bb.pdfIn PDF document text
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdfIn PDF document text
    • http://gifixof.richmenlooks.com/uploads/1/3/0/8/130874038/8903896.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/1/0438/1540/3682/files/givusag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/event_name_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/xerezetijokorixig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/the_case_for_christ_lee_strobel_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9765/1352/files/74572729542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/attitude_and_behaviour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7764/5974/files/lawinekajajipuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9354/7426/files/btec_level_3_national_sport_book_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/14793987344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5378/3957/files/tuwiremuxolabepolofuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5597/2506/files/el_embarazo_en_la_adolescencia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/spectrum_cable_tv_guide_dallas.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 8

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_off00006a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6D 5740 bytes
SHA-256: 289fa8632160e75e3a438ba6bc36b1ceca45ff3bcf67fa52231da07fb3ecb0e7
font_01_sfnt_off00007e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E05 10288 bytes
SHA-256: 4b1e9534f6b8b39b8b6b9dba1239e09c7c5617f2549fb861463e29ed8847aa59

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