Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e2ad46576288fe…

MALICIOUS

PDF

45.3 KB Created: 2020-08-06 11:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f647d6b61afe8419ba3a74001085ca0c SHA-1: 8abcc92196f155eb767d683f2b56c52bb6420d3b SHA-256: c1e2ad46576288fef22398a37b67e9f6ec4688e9bb42ed5822fa00abff7a6ba7
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing numerous embedded URLs. One of these URLs, 'https://ttraff.ru/pify?keyword=propionic+acid+derivatives+pdf', is identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of many external links suggests an attempt to lure users to potentially harmful content. No scripts were extracted from this sample.

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=propionic+acid+derivatives+pdf
    • http://doretigo.pearlpartypalooza.com/uploads/1/3/1/6/131607131/3898838.pdf
    • http://files.invivoplanet.com/uploads/1/3/1/4/131408899/fogaga-dajobaweto-wokavuxono-zuvofuwivote.pdf
    • http://files.midwestcraftshows.com/uploads/1/3/0/8/130873717/mefitusen-nisirovotipas-zasawizo-zasifo.pdf
    • http://files.yashbangera.com/uploads/1/3/0/7/130738625/83486b04a35.pdf
    • http://files.lewisandclarkriverboat.com/uploads/1/3/0/9/130968984/tagane.pdf
    • https://cdn.shopify.com/s/files/1/0432/7656/6684/files/pedejimopajuralogefu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/42185855366.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13002849425.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/46552900387.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/gejovufojabiminamis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/ferumezavigegenuzajub.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/48038657758.pdf
    • https://cdn.shopify.com/s/files/1/0434/7094/6456/files/67071413827.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/16709051725.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/71462015337.pdf
    • https://cdn.shopify.com/s/files/1/0429/1353/0019/files/verigoxin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.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_off00006ee7.bin
f0c7cec8d2ef526ce07da8fe3fc6b9fa9c67c49b4ff05171cca0b61050ca20e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE7 5180 bytes
font_01_sfnt_off0000809b.bin
effdd19ba6edea3353a949085b27ffeba4004c82728eebb1016e29d6ee0c87ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809B 12252 bytes

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