Malicious PDF — malware analysis report

Static analysis result for SHA-256 5304b0f27523d283…

MALICIOUS

PDF

52.5 KB Created: 2020-08-21 03:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c60268896eeeaf1d5ed29ff10c2b2d37 SHA-1: 16214404f62aa11e4b67a20d45d33e5a30decb23 SHA-256: 5304b0f27523d283dd3d7ffb6c1ef0b9fb1e752f64fb152c832cac9bc5fdc4f2
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=arya+movie+collection+free', suggesting a lure related to movie collections. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious IOC is the ttraff.com redirector.

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=arya+movie+collection+free
    • http://seriwe.huffmansflowersofthefield.com/uploads/1/3/0/7/130739892/jopegutoro.pdf
    • http://gaken.pierrefamille.com/uploads/1/3/1/3/131380600/vujuwev.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0243/files/tegagipodimexiwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/61601795458.pdf
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/robavonereti.pdf
    • https://cdn.shopify.com/s/files/1/0432/2846/3271/files/larson_algebra_2_texas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/puzizesukubesapuwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8051/4726/files/joxovarujesidokedutipaso.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2102/files/laxoledumomapub.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/fisalemigef.pdf
    • https://cdn.shopify.com/s/files/1/0434/9345/8070/files/71252395001.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0171/files/87166733185.pdf
    • https://cdn.shopify.com/s/files/1/0432/6267/3054/files/bomamonuzimazo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006834.bin
aef965c8c9dc60fadb652f8b62bb44f0f8d3eca8d9183dc398e4d4d83db6580b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6834 5000 bytes
font_01_sfnt_off0000792c.bin
2a47315e3ea8c75addeb09d82074727aeda0e374d6b836eb9dd246cfbd4d70a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 5604 bytes
font_02_sfnt_off00008bb1.bin
f568b0d71abb77c6b603cab61d82add5b2b12d6d945b6786feafa1f3a865d809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB1 10368 bytes
font_03_sfnt_off0000af61.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF61 16164 bytes

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