Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd2f316a3b9928d…

MALICIOUS

PDF

58.9 KB Created: 2020-08-07 19:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9288429f6c450cfca3da23a78a2babd7 SHA-1: 2e7f5c6d02026fad81ccc50a803bbe45b194764f SHA-256: 6cd2f316a3b9928db66f9f5ca7185e69d521dc735f81c32066c9ba4cd0c6ee1e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body and embedded links suggest a tactic of presenting seemingly legitimate content (e.g., books) to entice users to click through to potentially malicious sites.

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=b.+com+sem+3+books+pdf+gujarati+medium
    • http://files.alyssabautista.com/uploads/1/3/0/7/130740627/dimax.pdf
    • http://files.mindscapegallerystl.com/uploads/1/3/1/4/131407855/kunojikon.pdf
    • http://nuvigor.bajadesertsoap.com/uploads/1/3/1/4/131408027/guvefit_rifawuzadejoz_pazudewesemotu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/nedadezivarepu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/zunumesesubilegalifofevo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6944/files/87025054350.pdf
    • https://cdn.shopify.com/s/files/1/0434/6498/2693/files/78255902529.pdf
    • https://cdn.shopify.com/s/files/1/0433/0310/8768/files/wiimote_pin_finder.pdf
    • https://cdn.shopify.com/s/files/1/0441/3338/4344/files/atm_reference_model_in_computer_networks.pdf
    • https://cdn.shopify.com/s/files/1/0437/0802/2938/files/47503371675.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/88194015281.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/vuxodefugojedid.pdf
    • https://cdn.shopify.com/s/files/1/0430/6334/5301/files/39434129677.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/lufulejiji.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cdd.bin
03bddec5252135042af3c67ac127a147e34e6981f1f99a02d688ae3042c359a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDD 5744 bytes
font_01_sfnt_off00007069.bin
d97e055e11de589539a249dfdf9c15aca1e9caf4700104d1763a3a5d87d8f7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7069 2320 bytes
font_02_sfnt_off00007abb.bin
1b74c10d1d6167da703c52970ffa82e502b37ab32253841c791937e1e87d17da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABB 14880 bytes
font_03_sfnt_off0000a93a.bin
207faf14306426b668b87aba0c9d447b8ba40b67f0f7b18660ffa0d3c8132265		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA93A 16224 bytes
font_04_sfnt_off0000be86.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE86 4324 bytes
font_05_sfnt_off0000cc87.bin
066f9387ecd310a228ff747f50c17ea7a061fcb7affd694250505c6e5b9d4755		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC87 3696 bytes

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