Malicious PDF — malware analysis report

Static analysis result for SHA-256 fddff0ed44f43d03…

MALICIOUS

PDF

47.3 KB Created: 2020-08-07 04:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9cd567424498779f6eb67d298db95ab SHA-1: 490259a6f8fce25748d0a5a230360ec44ef70ddf SHA-256: fddff0ed44f43d03cc01ccde7a16518ad2f562044b549c3ea94d207b255e00c6
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 redirector service (ttraff.ru) known for malicious activity. The document body itself is heavily obfuscated but contains the same redirector URL. This suggests the primary purpose is to lure users to malicious sites through a link farm, likely for phishing or malware distribution.

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.ru/pify?keyword=checklist+of+adaptive+living+skills+pdf
    • http://files.cutiepetutieoriginals.com/uploads/1/3/1/4/131407708/lojirifabomapo.pdf
    • http://files.tightandtidyplumbing.com/uploads/1/3/1/3/131398008/limotaz_dilaraxusexa.pdf
    • http://files.surrenderedtochrist.org/uploads/1/3/1/4/131453061/tufiwowekara.pdf
    • http://files.mojamaican.us/uploads/1/3/0/7/130739284/vopinanimuvakozivoxo.pdf
    • http://files.lifestylerant.com/uploads/1/3/1/4/131438293/viwatawemuruwobeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/peripheral_vascular_disease_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/11509331673.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/13691064325.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/fedojotisonunuwum.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/jujudulilozefosedivizubu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/99685318079.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/ruxovenabeposumeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/polonafebomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0494/files/614619393.pdf
    • https://cdn.shopify.com/s/files/1/0428/3626/3078/files/sofazuwunokoja.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/civ_5_enhanced_ui.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/8938912547.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6826/files/xugalemexigib.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/kanopig.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_off00007b52.bin
8fc9487a7cdd4e62d4d29e3a30c42e287d3ad52e9503270de75ed1a9c580b44a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B52 5352 bytes
font_01_sfnt_off00008d92.bin
dd040d36b3357ef31ffa9d7eed759850e937ffc58eb4b23a6ef0f6ae524f8662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D92 10060 bytes

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