Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fed0f6d6aca838…

MALICIOUS

PDF

39.9 KB Created: 2020-08-14 15:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d650669818d3852bde2b04d2e5c33d63 SHA-1: 7a07a7450995422ec48e0532eddb20034f1fb509 SHA-256: 04fed0f6d6aca838c2b34f0faf5ff0951f0ad5f2c32851f31a3ac0d63f701acb
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary URLs, 'https://ttraff.ru/pify?keyword=beautiful+wallpapers+for+android+mobile+free', is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to wallpapers and the creation tool 'wkhtmltopdf', indicating a lure to disguise the malicious intent. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or redirection attack.

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=beautiful+wallpapers+for+android+mobile+free
    • http://nisinuke.unitykcnorth.org/uploads/1/3/2/6/132682790/mariv-lonikixepe-veridure.pdf
    • http://files.religiousdoodles.com/uploads/1/3/1/3/131379578/9d7517d15303.pdf
    • http://legiro.thelearningrunner.com/uploads/1/3/0/9/130968931/5a284d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/auxiliary_verb_do.pdf
    • https://cdn.shopify.com/s/files/1/0433/1995/1513/files/78728271100.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/51589969328.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/30312334251.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/pimp_my_teens.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/43058756502.pdf
    • https://cdn.shopify.com/s/files/1/0428/9986/5756/files/63723341352.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/68959591537.pdf
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/79711599186.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/muritixivevelegokefulilu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/pitaweta.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/nbte_curriculum_for_hnd_business_administration.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/biludetejuvujatolometa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d79.bin
3b2b45e718f58b0cc1a2df40c7b04d6bbbb94c44b5ff501432835d20cf9bf735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D79 5468 bytes
font_01_sfnt_off00007000.bin
2a3f792d45c42eb4307ef083796a0910aafd408587a770cb5120ffe9c4313352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7000 10128 bytes

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