Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd7ec187ba15b1d…

MALICIOUS

PDF

44.1 KB Created: 2020-08-26 14:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27c425130c67569b285a9f4e42a59571 SHA-1: ecff7c7e0ca6807495470e8e3710f03b335d8742 SHA-256: ddd7ec187ba15b1d9283f3b9c8ca87cd560d5c09472f194c2ec68ec01784403c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=windows+98+img+dosbox+download'. Additionally, it features a PDF link farm with numerous links hosted on cdn.shopify.com, many of which are likely part of a SEO manipulation tactic to drive traffic. The ML classifier also strongly flagged this PDF as malicious. The presence of these links suggests a social engineering attack aimed at tricking users into clicking through to malicious or deceptive content.

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.com/pify?keyword=windows+98+img+dosbox+download
    • http://files.fpvofrc.com/uploads/1/3/1/8/131856372/kosenineduzofax-wumafivotamuma.pdf
    • http://files.strive4business.co.uk/uploads/1/3/0/8/130813975/5365027.pdf
    • http://files.pdokenya.org/uploads/1/3/0/7/130739697/508771.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9970/files/gapavuzet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/dictionnaire_scientifique_anglais_franais.pdf
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/46065331844.pdf
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/catalizador_quimica.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/ximadorijuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/august_2020_current_affairs_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/badinerie_piccolo_trumpet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/narerofamogujobububorigav.pdf
    • https://cdn.shopify.com/s/files/1/0429/2375/3635/files/tetoxorexa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4438/7481/files/mariadb_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/venom_easy_balance_lipo_charger_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/bestimmter_unbestimmter_artikel_deutsch_bungen.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d0e.bin
3d38ea279790eb964bace95e93304694016b0b012f7a31ce054d10cfe211d98e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0E 5712 bytes
font_01_sfnt_off0000807e.bin
cd25a18cf3b7ace4e58008fa891550fad7e78bc30afd6f37d3f3503c3bfffc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807E 10232 bytes

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