Malicious PDF — malware analysis report

Static analysis result for SHA-256 97532407fe3e09de…

MALICIOUS

PDF

62.5 KB Created: 2020-08-13 23:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29c6435905cb4f2d4376df85b8f02822 SHA-1: 378108c7961a0ef16d81472e150ec0f69310c936 SHA-256: 97532407fe3e09de2b60af6998ac4c7791cb48173cf002699469796739265a9d
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is disguised as a resource for graphic design templates. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further indicates malicious intent. The document body, though heavily obfuscated, contains the URL to the redirector, suggesting it's the primary lure.

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=graphic+design+leaflet+templates
    • http://files.owius.org/uploads/1/3/0/7/130740374/kugajudujuz.pdf
    • http://banosabuz.nicolenaro.org/uploads/1/3/2/8/132814930/8627702.pdf
    • http://tadumiw.jodymitchellprints.com/uploads/1/3/1/4/131437423/jesixuso-falizano-legapivuvobemop.pdf
    • https://cdn.shopify.com/s/files/1/0448/3471/7858/files/12362347362.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/kanotowabitujewoxip.pdf
    • https://cdn.shopify.com/s/files/1/0436/4628/8025/files/58322830625.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/indd_to.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/jomarezojosubawa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7097/1299/files/83868859534.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4096/files/55306893127.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/45148711758.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/wedatopisajakafuvesinafof.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/29064858089.pdf
    • https://cdn.shopify.com/s/files/1/0437/7529/5640/files/56774128208.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9269/files/cerere_concediu_odihna.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_off0000b696.bin
8654d42ee72e5f24ed870cec6a06506cbfb9303567a5f7fbfdff663e82d42a63
pdf-font-stream PDF embedded font (sfnt) at offset 0xB696 5600 bytes
font_01_sfnt_off0000c973.bin
6a5d00363ea53812e33f8b95ab69975de375accfac2f5116f2bc656798a5391a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC973 10360 bytes