Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e9e910968be10c…

MALICIOUS

PDF

39.8 KB Created: 2020-08-06 18:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f9ddba261ea6f76bd815364c427c00a SHA-1: 8181606c51643e60f518fab2847329682edd7418 SHA-256: b6e9e910968be10c46e3c9b1bd50de61d92c07755abd7e62746461c2e0fca721
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, contains the same URL as the primary redirector. This indicates a deliberate attempt to lure users to a malicious site, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=love+and+life+billings+method+pdf
    • http://files.promival.com/uploads/1/3/1/6/131637656/c4c828207753.pdf
    • http://files.nullarbortimberslabs.com/uploads/1/3/0/7/130739376/9247430.pdf
    • http://natomapo.chicagoforklift.com/uploads/1/3/0/8/130815009/198097.pdf
    • http://files.kolega-guesthouse.com/uploads/1/3/1/4/131438427/8247577.pdf
    • http://files.catastrophizer.com/uploads/1/3/1/3/131380741/suxuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12086745869.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/gatilaxezuxowabenomewuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/gejejonafubibavirab.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/87986469086.pdf
    • https://cdn.shopify.com/s/files/1/0440/4723/7285/files/5906296904.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/pimesegu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/90532261978.pdf
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/kusuguk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/lomukokorawifor.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/tuveduzoxubibibafewade.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/zhu_faded_mp._3.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/ron_white_son.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_off00005e27.bin
a52300b09ae51c6319895a0b4c394de6e2565354220644cd7b09e81ec3f2f133
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E27 5500 bytes
font_01_sfnt_off000070c1.bin
073249c6cad98973c74e6b2363f6381daa4fefc02909e625c70f9b87c22f0545
pdf-font-stream PDF embedded font (sfnt) at offset 0x70C1 9872 bytes