Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de10856176661f5…

MALICIOUS

PDF

38.7 KB Created: 2020-08-12 08:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe8367d2647299bf61fae2c74c160eaf SHA-1: 281fa9e719936d3b022702b6127cc2ccb806ef41 SHA-256: 6de10856176661f565eeffbed9aa1bea54ee1e41ac5a31d303feee8f9f2ea2ab
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is part of a link farm designed to distribute malicious content. The document body also contains the same lure text and URLs, suggesting an attempt to trick users into downloading further malware. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+download+quran+english+translation+pdf
    • http://fepel.spokanehomeprep.com/uploads/1/3/2/6/132682076/sosof-votupixu-lamiwotaxikufut-lixoj.pdf
    • http://files.standtallbakeshop.com/uploads/1/3/1/4/131453902/2792014.pdf
    • http://files.marshallconservatory.com/uploads/1/3/0/8/130815026/1484123.pdf
    • http://files.ylhoustonsw.com/uploads/1/3/2/7/132740545/zisuvera-bulifiguwuzezup-bagizarexav-nasunosiwipow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1242/9723/files/formulaire_2020_ifi_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/0710/7495/files/annexure_d1_hssc.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3880/files/bebexurobolelorazij.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/airdrop_mac_to_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/astm_a53_grade_b.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/semam.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/apache_camel_in_action_second_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/9565/2504/files/bawolotagewoxigatolimex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/jipenamoxoxufamilab.pdf
    • https://cdn.shopify.com/s/files/1/0432/3275/5875/files/51241041122.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigazisamakolomomabixefox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/gazugaviva.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005971.bin
de1b2a7ebf68411c6136081a4b23388ca9369f298e1b6a7ba7ddb86b464327cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5971 5476 bytes
font_01_sfnt_off00006c14.bin
3ae2c8828c9abf17c1bb55a5dadd0be51ddfad67c647ab4226e26b862c22702a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C14 9852 bytes

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