Malicious PDF — malware analysis report

Static analysis result for SHA-256 a853993d5fc151a3…

MALICIOUS

PDF

71.5 KB Created: 2020-08-10 23:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ffb190c73153a1b0c99d158248c7981 SHA-1: 07e2f1eafcaf6acb9007c9b9b92a531a06d0bbd4 SHA-256: a853993d5fc151a33f25098835edcec030806db3da17f951f057dff2ae28dafe
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that leads to a known malicious redirector. This suggests the document is designed to lead the user to malicious content, 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.cc/pify?keyword=warsaw+pact+history+pdf
    • http://files.greensoundhightech.co.uk/uploads/1/3/0/7/130776511/5719532.pdf
    • http://files.themerchantsguildstore.com/uploads/1/3/1/4/131407493/98730559d3.pdf
    • http://xijul.lakefieldvisioncare.com/uploads/1/3/0/8/130874429/temetufimum.pdf
    • http://files.tegriggs.com/uploads/1/3/1/3/131383533/832465.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/eating_fruits_on_empty_stomach.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/7010/files/phn_mm_chuyn_sang_file_nh.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/1826816750.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/nefijajize.pdf
    • https://cdn.shopify.com/s/files/1/0435/2580/0087/files/download_bastard_devil.pdf
    • https://cdn.shopify.com/s/files/1/0433/5435/7915/files/australian_child_passport_renewal_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/bike_shop_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/categorical_proposition_example_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0437/2132/6742/files/nukisixerubaluwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/11418516921.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c131.bin
8299caa6697ce195955880122f6d363fad9a43452f41bc38fc43842df85bd0d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC131 3432 bytes
font_01_sfnt_off0000cd72.bin
eefd744dfc60f66c7af5bd1a6fea6f80b658e6a916e3d5f9b33b1984eb2b0871		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD72 4984 bytes
font_02_sfnt_off0000de85.bin
027abf031fe104dff0ca655b4ee8c67e75e0e00b8d03235ccc73c47ff9051a21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE85 10396 bytes
font_03_sfnt_off00010237.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10237 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.