Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c800cc70ed92a98…

MALICIOUS

PDF

57.6 KB Created: 2020-08-24 16:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12fe30b95726d5bbcc2a673d16cfe830 SHA-1: 9d33c42cef2272759d154f0939d26f83d4c3adc5 SHA-256: 5c800cc70ed92a9803e90a98483168f88fdba8c381deeeb5875014a9f6dc51ef
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=einfacher+apfelkuchen+springform+streusel'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign Shopify links but likely serve to obscure the malicious one. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector suggests an attempt to lure the user to a harmful site.

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.ru/pify?keyword=einfacher+apfelkuchen+springform+streusel
    • http://files.joshuastraub.net/uploads/1/3/0/7/130738939/tifabivuwedugo.pdf
    • http://files.annemariemarcinek.com/uploads/1/3/0/8/130874207/bazofazu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9181/0717/files/dadekisumafasamel.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6381/files/jimagimiwepetimujononit.pdf
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/55194300919.pdf
    • https://cdn.shopify.com/s/files/1/0434/5446/4165/files/arduino_nano_projects.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2749/files/big_bang_theory_physics.pdf
    • https://cdn.shopify.com/s/files/1/0444/0922/5382/files/spring_rolls_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0430/1167/0179/files/introduction_to_kinesiology_4th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3570/files/pandas_dataframe_apply.pdf
    • https://cdn.shopify.com/s/files/1/0446/1549/9939/files/ardenas_1944_antony_beevor.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/bikibopagunupuwabunemuzo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1419/2285/files/joxurulagokar.pdf
    • https://cdn.shopify.com/s/files/1/0438/9722/5368/files/11528554659.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/pemovulumeke.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/wudulezilumegidixokaxi.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f3d.bin
a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3D 6440 bytes
font_01_sfnt_off00007f31.bin
aada1f1efe3ed098e2c3fbfc3fc8185152c6136a516e3df84064a6e4fe320534		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F31 5448 bytes
font_02_sfnt_off00009186.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9186 1800 bytes
font_03_sfnt_off00009a13.bin
70085838a2b1cfb7415684e0955d20b34faf7a72b10affd4871bebb7ca484bba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A13 11760 bytes
font_04_sfnt_off0000c062.bin
b7c299703b3dd81765663870cd96ff12ce36bab60d46ac4ddf719f3c8dfc5471		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC062 16448 bytes

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