Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ff28fbc07017aa…

MALICIOUS

PDF

45.4 KB Created: 2020-08-13 23:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f4f5976f5578106966c23b49667732f SHA-1: 36c15b4913f7b50f599b2ca5c7872ac9c8fa8d54 SHA-256: 76ff28fbc07017aad400d2f625b22b6c9f31b7c8f30ab11993c5583af2d00caa
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a PDF redirector link to ttraff.com, which is known malicious infrastructure. The document body contains a seemingly innocuous title and authoring application details, but the primary malicious functionality appears to be the mass distribution of external links.

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.com/pify?keyword=machine+movie+background+piano+music
    • http://files.mariecharpentier.net/uploads/1/3/1/4/131483019/batipaxadas.pdf
    • http://files.originalsexyslave.com/uploads/1/3/0/9/130969004/ca2abe.pdf
    • http://files.asliceofpierolla.com/uploads/1/3/1/3/131379552/vofizuwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/safoxuginexuvunifikopowi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7818/0257/files/webuwutamebawetitafam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/english_writing_skills_in_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/44597162799.pdf
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/gemapopadek.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/83909935423.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/mavurapusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/vogomisugobawoponurefas.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/mizasunezitebaxutivabali.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/kawijudominaloxoxofada.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1973/files/91322594655.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/sulitexisepinubotixaxikaz.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_off00006556.bin
acf47524ff68c6334a0801c589f5768478a502707f80e30317230f621ad179df
pdf-font-stream PDF embedded font (sfnt) at offset 0x6556 5528 bytes
font_01_sfnt_off000077df.bin
831bdf831bd85083390d9d5913497a7180b839f8069c36e94188569b03c654fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x77DF 10128 bytes
font_02_sfnt_off00009a93.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A93 4324 bytes