Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d337579340a873…

MALICIOUS

PDF

113.7 KB Created: 2020-08-30 08:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 195a5fdea643869f4390a56735d06d8d SHA-1: 03de26fad891c9cbf653487544da23f7b8617718 SHA-256: d7d337579340a8738e601301527e74e92672a8ae1de07306ad366617ae711f02
152 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/wix?keyword=fallout+3+cheat+terminal'. Additionally, another critical heuristic indicates a PDF link farm, with the dominant host being cdn.shopify.com, suggesting an attempt to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL.

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/wix?keyword=fallout+3+cheat+terminal
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/basasimi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/catecismo_da_igreja_catlica_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9588/files/aufklrung_zusammenfassung.pdf
    • https://cdn.shopify.com/s/files/1/0432/8869/0841/files/windows_movie_maker_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/xijasegotirilimamiwugi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/18785335020.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/kuduregasurez.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/class_ascomycetes.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/3992/files/usda_direct_feeder_cattle_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/3273/0017/files/enumerate_function_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/9066/4860/files/bobexumesu.pdf
    • https://cdn.shopify.com/s/files/1/0463/1547/1013/files/fixanixurunin.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/bavewarasosukawubibo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/animator_s_survival_kit_expanded_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/39807248920.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_off00017758.bin
11b74cb9af445a5e56716d6faea646c8242dd810dddb71546c6a31bb57062ed2
pdf-font-stream PDF embedded font (sfnt) at offset 0x17758 4980 bytes
font_01_sfnt_off0001881a.bin
e003197875f0c443bf84f60b2cb44939c0e59b0ea11140786afa377c513f18b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1881A 16012 bytes