Malicious PDF — malware analysis report

Static analysis result for SHA-256 9784548d5b249475…

MALICIOUS

PDF

43.5 KB Created: 2020-09-08 05:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30e7a848e95fc98b5d7501911047c590 SHA-1: 3bae04f6f1ae0a337a53146acbbd86e96ba98594 SHA-256: 9784548d5b249475006dd4cda607b8a56c8ef048a3253f94d4bc1ec6e7a5b87e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. The document body also explicitly contains this URL, along with a mention of 'Civilization war mod apk android 1', suggesting a lure to download potentially unwanted software. The PDF also contains a large number of external links, many hosted on 'cdn.shopify.com', indicating a link farm strategy, with one such link also present in the document body.

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.club/wix?keyword=civilization+war+mod+apk+android+1
    • https://cdn.shopify.com/s/files/1/0433/9793/9361/files/to_hell_and_back_audie_murphy.pdf
    • https://cdn.shopify.com/s/files/1/0432/3567/2219/files/pupabevodikusefigemerib.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/king_james_bible_1611_with_apocrypha.pdf
    • https://cdn.shopify.com/s/files/1/0464/7020/1502/files/16377382146.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5881/files/lofipuwasu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2668/3816/files/tepimefawasuwupudo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4075/8170/files/john_deere_750_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/77077700695.pdf
    • https://cdn.shopify.com/s/files/1/0469/0208/3746/files/kaukulan_ng_pangngalan_worksheet_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/ultraiso_for_pc_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27588499931.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/challan_form_punjab_university_for_noc.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/95648725853.pdf
    • https://cdn.shopify.com/s/files/1/0433/8833/8330/files/tamil_word_doc_to_converter_online.pdf
    • https://static.usrfiles.com/ugd/429b25_52e5bd1d8e5b434abdf6e29638c7932f.pdf
    • https://static.usrfiles.com/ugd/26938b_5d92f2cc167f40b797b47f76677932e3.pdf
    • https://static.usrfiles.com/ugd/c3548c_5152f45987ff45aeaab774a1c212c1e4.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_off00006c10.bin
7c0a8a7ec1762806e702ced08920bb7e4145c7b139609a46f7efa11931b4eb34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C10 5152 bytes
font_01_sfnt_off00007d9c.bin
2676c83732108db1e40fd4b4fa68f0652de85d8357b96b2e38f20ac4dd76002e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9C 10256 bytes

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