Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77b06355cb786af…

MALICIOUS

PDF

50.5 KB Created: 2020-08-01 05:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b70c4ccfcc937bf45df7ca4151f10401 SHA-1: f69f3902636166e00058d872396e7d0f32959190 SHA-256: c77b06355cb786af3f1178de673d40bf12d5c1bb6705691fce955356e95d7f00
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be directing users to malicious infrastructure via the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=how+to+get+extra+modifiers+tinkers+construct
    • http://files.christinaruloff.com/uploads/1/3/0/7/130776104/golorixujazot-gamiravaxinawun-busogosuwu.pdf
    • http://files.missmollysmemoriesphotography.com/uploads/1/3/0/8/130814611/376cf2.pdf
    • http://files.susangilmoreart.com/uploads/1/3/1/8/131856602/duvenebug-jefareferobumum-tuwugim-gedanifu.pdf
    • http://files.agsandproducts.com/uploads/1/3/1/3/131381374/zezudamimos-worotefir-tudupefuxedi-titufiwurolo.pdf
    • http://files.travelswithnicolle.co.uk/uploads/1/3/0/7/130740490/7983490.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/93367820611.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/45934327566.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/87924399785.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/zuratewinukumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/47738062011.pdf
    • https://cdn.shopify.com/s/files/1/0433/2699/6633/files/setenudekonuduko.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/kibirokuritatizulolibiru.pdf
    • https://cdn.shopify.com/s/files/1/0432/6549/1106/files/simujelogagikefetapokifu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/44239878887.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6000/files/competent_leadership_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078c3.bin
7d8d2027193279318ed74f16d0ecbd62003f4b31a187bdad02415480115f3b37
pdf-font-stream PDF embedded font (sfnt) at offset 0x78C3 5376 bytes
font_01_sfnt_off00008b14.bin
1d5f139cdd8355fc35fec4ab9ab24e2654e2250a63e7fe2315c60e55e2e220c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B14 10324 bytes
font_02_sfnt_off0000ae56.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE56 4324 bytes