Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf5077043488156…

MALICIOUS

PDF

92.3 KB Created: 2020-09-11 21:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18f1179be12f7c1d849b3a8b2d2b8d92 SHA-1: 2426a28cd8e419bcb196d9c28dedb6857674bf8c SHA-256: acf5077043488156abbe534facc02ad578f6c7793f7a0d4f25e8f434ae4bdede
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=the+amazing+spider+man+comics+1963+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to the lure, suggesting a social engineering tactic to trick users into clicking the malicious link. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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=the+amazing+spider+man+comics+1963+pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/52952943974.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/gozage.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/49820042628.pdf
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/feedback_form_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0430/0672/2211/files/xanikexilenofigugevato.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6604/files/25965639479.pdf
    • https://cdn.shopify.com/s/files/1/0452/6142/2753/files/81537837705.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/backroom_casting_erin.pdf
    • https://cdn.shopify.com/s/files/1/0433/1778/8830/files/short_reading_comprehension_passages_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/9155/6504/files/pazarakis.pdf
    • https://static.usrfiles.com/ugd/8b4172_3fbc949e238c45c781b40311be541941.pdf
    • https://static.usrfiles.com/ugd/a76634_4d4b4e4e801a4fa78dd318a806173fb3.pdf
    • https://static.usrfiles.com/ugd/e1c37d_19120cc6a51549c7b801698e0a816c9d.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_off00011cc9.bin
f5585e2837f7eaa464befc71d023b790b062001fd2202fa45321f53cbbca8080
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC9 6060 bytes
font_01_sfnt_off00013146.bin
8d26b5674ed3dbd7959ccf4c25977ff6d3ae6dbc3a7df5c6fe8b536a1ddeeba3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13146 15572 bytes