Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a31652dd2d8912…

MALICIOUS

PDF

43.5 KB Created: 2020-08-07 05:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6fae898fa39a2fcccc77b13421ba2c9 SHA-1: 5e7ba69fa66114f5d6cb9c31086012ccc7a748ad SHA-256: 12a31652dd2d8912cdf146cd159863a315368388e9bda3a10f304bb1d010a829
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.cc/pify. The document body, though partially obfuscated, contains text related to accounting exam questions, serving as a lure. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points towards a content-scraping or SEO-poisoning attack.

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=accounting+exam+questions+and+answers+pdf
    • http://kudofosur.norbyco.com/uploads/1/3/1/4/131406390/paguj-datexolip-tisodusiki-bowerokebolijal.pdf
    • http://files.dancingbythesilverymoon.com/uploads/1/3/2/6/132681342/furisuratafekavinex.pdf
    • http://files.dileoenglish11h.com/uploads/1/3/1/4/131437919/xufiz-nipagip-seritofok.pdf
    • http://files.richardeldridge.com/uploads/1/3/0/9/130969497/9718013.pdf
    • http://files.illianagymnasticscomplex.com/uploads/1/3/1/8/131857476/ab4cd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/46909046745.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/bememanivarebilokama.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/98920155912.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/joanas_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/0885/0081/files/stepper_motor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/savowogofoxifonikili.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/indexing_and_abstracting_in_library_science.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/categories_of_nursing_personnel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/84708610822.pdf
    • https://cdn.shopify.com/s/files/1/0436/1568/2717/files/arduino_string_split.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/31584570325.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/48127212975.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_off00006787.bin
4e610c66b1c6475c011f33cfb2a1009e3e75760859fbf64ba4b6f65d7b805b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6787 5720 bytes
font_01_sfnt_off00007afd.bin
029270c6a4280593482829a3ccff19ebfe9c7667c61bb85dec0dfc8f7d9c6a4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFD 11376 bytes

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