Malicious PDF — malware analysis report

Static analysis result for SHA-256 526f3a2f961c2593…

MALICIOUS

PDF

39.1 KB Created: 2020-07-17 21:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ca1fec3684213fccdd29bcdca4753f5 SHA-1: 0e25894f6b4146b58188f856e177b8ccf20f961f SHA-256: 526f3a2f961c2593e40617efb44ceba61975fd38930350e45442469470069c8d
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, characteristic of a link farm used for SEO manipulation and traffic redirection. The document body, though heavily obfuscated, suggests a lure related to a 'Hawker battery service manual'. The primary intent appears to be directing users to malicious infrastructure via the embedded links.

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/wb?keyword=hawker%20battery%20service%20manual
    • http://files.battlecomicsllc.net/uploads/1/3/0/8/130815664/wazaniro_rezoxirok_tenot.pdf
    • http://files.unfinishedartspace.org/uploads/1/3/2/3/132303269/sezog-wekewiwub.pdf
    • http://files.agathafashion.shop/uploads/1/3/0/9/130969375/9654079.pdf
    • http://files.animalvetfairfield.com/uploads/1/3/0/8/130874518/xorim.pdf
    • http://files.millhillarts.com/uploads/1/3/1/6/131607093/xiweburetem-wamujisexire-witov-taguzale.pdf
    • http://files.firetobekindled.org/uploads/1/3/1/4/131453256/zumemilizelexotozo.pdf
    • http://files.5-0-lou.com/uploads/1/3/0/8/130873965/nonijizare_xusevijajepuwan.pdf
    • http://files.i-helpfoundation.org/uploads/1/3/1/8/131856769/9988697.pdf
    • http://files.i-h
    • https://botejudepej.files.wordpress.com/2020/07/37955170064.pdf
    • https://jikizazona.files.wordpress.com/2020/07/7504585970.pdf
    • https://nolifajidame.files.wordpress.com/2020/06/63429387886.pdf
    • https://fufejuf.files.wordpress.com/2020/06/loxaniganuzapexekenope.pdf
    • https://cdn.shopify.com/s/files/1/0430/2916/8282/files/42392166.pdf
    • https://cdn.shopify.com/s/files/1/0430/7707/5108/files/40691832401.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/jorapizodopiviba.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3674/files/24620533865.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xamunodobesezuwenetubaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/jetoxidolanikakorixilume.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/kipafunizemuwanoruxaxo.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_off00005c40.bin
7ea4382042985264680fb71ff3f91f44c49438939f6c61f52b9a4c1e6d6b5e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C40 5136 bytes
font_01_sfnt_off00006db8.bin
b689668e34745eb0daa6790cd6dcdbb38b32b1a850adfbb9e4e96f5515d1545b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB8 9728 bytes

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