Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7f96ae49715331…

MALICIOUS

PDF

44.1 KB Created: 2020-09-04 18:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 361e8956d55ce957429d4dfb0fcafa3c SHA-1: 2053d4a959712605c0a59e9f07d695f0fe4ec043 SHA-256: 8c7f96ae4971533109ee869308a8664709f26b596401cfee610a5ca38f5cdcd4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=free++pregnancy+calendar+week+by+week'. This URL, combined with the PDF_SEO_LINK_FARM heuristic indicating a large number of external links, suggests a phishing or malware distribution attempt. The document body, though heavily corrupted, contains fragments of the malicious URL and keywords related to a pregnancy calendar, reinforcing the lure. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of 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.club/wix?keyword=free++pregnancy+calendar+week+by+week
    • https://cdn.shopify.com/s/files/1/0434/9440/8357/files/carcinoma_de_celulas_escamosas.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/53563676101.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/29317881693.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/gumufez.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/3457082540.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2781/files/lewowururifobenid.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/tivubodepoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/julakivage.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/municipios_de_puerto_rico.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5144/files/bivevojavabufug.pdf
    • https://cdn.shopify.com/s/files/1/0461/9593/3347/files/l2r_farming_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zigomotixiwututorevibalu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/best_daimyo_eu4.pdf
    • https://static.usrfiles.com/ugd/30ea26_b75d376c98f7428da3ce9ba2c62aa1b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_7094a8965da7427196345dcf8399505a.pdf
    • https://static.usrfiles.com/ugd/9d24cb_a7ff85a2294943eca5361cbfb157ed77.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_7310384009944c1799476aeb2a3d94e8.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_0133fc64240c47a084ad0c68adabfb59.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_off00006dc3.bin
fc210b016248a85a92f73f217ab5a18a64478e82a9e9feb8743765e0531c8044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC3 5416 bytes
font_01_sfnt_off00008057.bin
bac01538fe1a80549a1260d700572c7bc85d3c6ac8246709cd48b9764b2d1d8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8057 10280 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.