Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb53b9f2e74fe382…

MALICIOUS

PDF

60.2 KB Created: 2020-08-22 18:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9562f4035a77ff810f476b38f266df2 SHA-1: 374f6df9385c47333087586f598a9da8a7395616 SHA-256: bb53b9f2e74fe382dcd26b0a5a98241626fcbc1200f5e12558520a24796bb394
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, likely for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector at 'ttraff.cc', which is used to deliver the final payload. The document body, though heavily obfuscated, contains references to 'animate cc for pc', suggesting a lure for software downloads.

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=animate+cc++for+pc
    • http://lofejiru.bantrybayponytrekking.com/uploads/1/3/1/4/131438860/wixun-kazetav-juvavenokulak-legudutidomez.pdf
    • http://files.cosmicbabies.org/uploads/1/3/0/8/130874432/9fd14acf0d0.pdf
    • http://files.lsbookkeepers.com/uploads/1/3/0/7/130739593/muwofuwafe.pdf
    • https://cdn.shopify.com/s/files/1/0438/7173/1880/files/convertir_de_a_word_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/8830/5575/files/31502084662.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/31595878002.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/xomogizanazagajuxetog.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/zabuju.pdf
    • https://cdn.shopify.com/s/files/1/0431/3120/7837/files/35238573906.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/kefilonevuxiwudi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6260/files/jopetafopogubebusep.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7567/files/atividade_analise_combinatoria.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/66275259531.pdf
    • https://cdn.shopify.com/s/files/1/0430/9788/2773/files/98069655896.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_off00006129.bin
189bd1ef8f73d647ad3641f68b0a3128ad5fd21f937719263c05a9bf51b3c656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6129 20296 bytes
font_01_sfnt_off0000a228.bin
8ee994fd719d92f4ca6e214c31794fbc3380908746ce44ea8b295df5ff76e5e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA228 4940 bytes
font_02_sfnt_off0000b2d7.bin
f49c55a57068a9dc2982aa54f32f690dfd9751648c0041f671fe35828186602a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D7 16344 bytes

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