Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e26461409e1064…

MALICIOUS

PDF

33.1 KB Created: 2020-08-12 00:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db9bf852c09db6dec711a3de2dff853a SHA-1: 9a3fe85a9ab0bb8483a6c9f594078513395ac31c SHA-256: 01e26461409e1064486db3d63d562fbd9001531ba0dff3e2d9e5a592d6ad97a5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are algorithmically generated and point to potentially malicious domains. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=andreas+moritz+pdf+chomikuj'. The document body also contains this URL and numerous other links, suggesting an attempt to direct users to external content, likely for malicious purposes such as phishing or malware distribution.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=andreas+moritz+pdf+chomikuj
    • http://files.bayjedesigns.com/uploads/1/3/1/3/131398109/154b1.pdf
    • http://tefojepoz.vintagefisherpricetoysbyauroramorningstar.com/uploads/1/3/2/8/132814930/lajiwujewulum.pdf
    • http://files.kegandcloverag.com/uploads/1/3/1/8/131856907/sesixaxo.pdf
    • http://files.touchoflovewellness.com/uploads/1/3/0/7/130775055/06fffcba63.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/22709459252.pdf
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/53218427941.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/anatomy_for_sculptors_understanding_the_human_figure_hardcover.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/26778848997.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/beauty_standards_around_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/walt_disney_world_orlando_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/58508211408.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lutekalejore.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/10658112777.pdf
    • https://cdn.shopify.com/s/files/1/0436/6771/8309/files/3611810284.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/tafuvebupirevelubimiruwob.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/do_the_evolution_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/csgo_default_config.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_off000047c5.bin
ed11a5d54592eb813bbd57d60eafbaee27c44e930817a989d09b6265ce6941d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47C5 5544 bytes
font_01_sfnt_off00005a7c.bin
18086e482befb09e43a33a1ffb7a0e99f3b47979a5779a98d0eb87d52915359e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7C 8540 bytes

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