Malicious PDF — malware analysis report

Static analysis result for SHA-256 019a781e19f9a339…

MALICIOUS

PDF

40.1 KB Created: 2020-09-04 00:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1c6e0e81932f617e92380365fab6984 SHA-1: 9d9ba5be320f38e7f4025f5c77936f3760b30fd8 SHA-256: 019a781e19f9a339c55e593e5ed13c5f6636b0cef72ad9f1476b1ed434135782
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/wix?keyword=afl+live+2+free++pc, which is flagged as a malicious redirector. The document's structure suggests it is designed to lure users into clicking these links, likely leading to further malicious content or downloads.

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/wix?keyword=afl+live+2+free++pc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f8de3e_ece98e988b434be694d5cd9318831f10.pdf
    • https://static.usrfiles.com/ugd/26481d_af50bff1fd274f78a133d3f183fbd03d.pdf
    • https://static.usrfiles.com/ugd/16a96a_408afd7606eb4f7f98c21550f49f5766.pdf
    • https://static.usrfiles.com/ugd/1ebe14_806c434751b64baf9ec46b95d2c4c1c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f2d6b9ecb524da2a609b22c7b26dafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/origin_of_basic_biological_molecules.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/48706339290.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54903558396.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/minecraft_mario_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/biology_textbooks_for_high_school_students.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9365/files/wuxopako.pdf
    • https://cdn.shopify.com/s/files/1/0463/4581/4173/files/bypass_google_account_galaxy_j2_prime._zip.pdf
    • https://static.usrfiles.com/ugd/e3ff21_c7ce69a999ec4d589fe960a6d2b07373.pdf
    • https://static.usrfiles.com/ugd/55f640_cabb01ae4e5b427ba1bb861d3a8d6d72.pdf
    • https://static.usrfiles.com/ugd/90c678_957f64692dd34a158323feb029d5fc5d.pdf
    • https://static.usrfiles.com/ugd/2c608b_90eb39cf011f4f6b82a7828f9f1bb2c7.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_off00006154.bin
8c074670bcbe47b943ea1d63bedc314328a108cde2b64e975b1ab5e0e807f499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6154 4800 bytes
font_01_sfnt_off000071ca.bin
e927d4982165d317769b2f459dcd664523bc31516bd41370c4480a571004da6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CA 9968 bytes

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