Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc88794a2ddcab7…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 19:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23d8fe414aeef1a31ae1a0c1d8a7357f SHA-1: 978d7ddd5da699ece2490d1badd5d6acc8f5369a SHA-256: 1bc88794a2ddcab75926d2b4fbbdffa32ad61d7ae53de0a0158572ce8121837d
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL, https://ttraff.ru/wix?keyword=harry+potter+hermione+granger+cinematic+guide, is embedded within the document body and likely serves as the initial point of compromise. The presence of numerous benign Shopify links alongside the malicious one suggests an attempt to obscure the malicious intent.

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=harry+potter+hermione+granger+cinematic+guide
    • https://cdn.shopify.com/s/files/1/0440/4133/9030/files/botany_practical_download.pdf
    • https://cdn.shopify.com/s/files/1/0459/9178/8706/files/63132775711.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/career_orientation.pdf
    • https://cdn.shopify.com/s/files/1/0457/3685/3660/files/28027325580.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/ashrae_psychrometric_chart_english_units.pdf
    • https://cdn.shopify.com/s/files/1/0435/3520/4511/files/bc_occupational_health_and_safety_act.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5fbf3bea70c4740b453ff6dc1dc224e.pdf
    • https://static.usrfiles.com/ugd/ba3095_ea43695116c7468c80122a550f933cf3.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_190c4dd61e904396a97f1329ded6b8e4.pdf
    • https://static.usrfiles.com/ugd/0779a3_ce2c7869903043ab9f67e84a5e1adcd9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c079e397d6b543469c9d93c04b4a128c.pdf
    • https://static.usrfiles.com/ugd/d775a9_686cc54717d74b62bc6f82cdb5f2a876.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_off000065e9.bin
ec63eda8b95cab8865aec296782da5560003c514d07fbf78792592dc061460b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 5340 bytes
font_01_sfnt_off000077ed.bin
22551329c7b2746b2a68510296df297e7ae92a4b4509538f7e8a412dbc7203a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x77ED 10048 bytes