Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b724859e00eaf59…

MALICIOUS

PDF

41.0 KB Created: 2020-09-01 06:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc1a73895abe7126546b65046b6d6cc3 SHA-1: bbc1098657a5c25789871d2335f10142078506d1 SHA-256: 7b724859e00eaf595362fa0835f3a21e4024fda6ba2a0c50bad12e80384a3820
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body text, though corrupted, includes a phrase related to a 'Tensile test of steel report' and the malicious URL, suggesting a lure. The presence of a large number of external PDF links, many pointing to Shopify, indicates a link farm designed to obscure the malicious redirector.

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/pify?keyword=tensile+test+of+steel+report
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/gap_analysis_word_document_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/4361/1036/files/29415511214.pdf
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/mal_estar_na_civilizao_freud.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/57697116759.pdf
    • https://cdn.shopify.com/s/files/1/0439/8638/7102/files/ielts_simon_writing_task_1_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2308/files/bored_button_gold_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/35612207522.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/wugiwam.pdf
    • https://cdn.shopify.com/s/files/1/0437/1965/5579/files/windows_xp_tablet_pc_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9576/files/sigozajexijefi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/cours_d_amortissement_degressif.pdf
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/hanuman_chalisa_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/54292980482.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8919/files/pasomibusajusulove.pdf
    • https://static.usrfiles.com/ugd/735424_09b26f5b96c647b293ff5754c3dfef06.pdf
    • https://static.usrfiles.com/ugd/43d598_cfc752b6a02248839fca751f15dd3264.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_off000062e3.bin
f2af99c57d16d570aef7fef557afae7714b7137a07f1ff69c813408280675bad
pdf-font-stream PDF embedded font (sfnt) at offset 0x62E3 4632 bytes
font_01_sfnt_off000072b5.bin
b072e07120c65d98c3248068849f2382f82badd178780f2cb03c024f3d6c64ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B5 10644 bytes