Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e0bc3fe4e933e3…

MALICIOUS

PDF

52.1 KB Created: 2020-08-25 23:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd2372fcf3b0b5cdbb697175845be303 SHA-1: 92d40414f7cc75a01941e473de8f8f4615ed0804 SHA-256: e3e0bc3fe4e933e36954c45e4dfd2a490f95c334ccc2b476e5978411f5bcccb7
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=titu+andreescu+imo'. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the redirector URL, reinforcing the lure. The presence of multiple PDF links and a malicious redirector indicates a phishing or redirection attack.

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.com/pify?keyword=titu+andreescu+imo
    • http://gegati.cosmicrockbooklets.com/uploads/1/3/1/6/131637814/ce55f.pdf
    • http://golavab.redmoonpathways.com/uploads/1/3/0/7/130775075/6675339.pdf
    • http://rafup.workpersona.com/uploads/1/3/1/4/131406455/gutim.pdf
    • http://files.al-shields.com/uploads/1/3/1/4/131407357/riwaralo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6483/3686/files/metal_bending_machine_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0436/9996/2024/files/tipaxozat.pdf
    • https://cdn.shopify.com/s/files/1/0435/3720/3364/files/microsoft_office_crack.pdf
    • https://cdn.shopify.com/s/files/1/0430/3264/1689/files/xazavuvisezizoromutonadis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/exemple_d_un_cahier_des_charges.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/petefirimifageretus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/70931360054.pdf
    • https://cdn.shopify.com/s/files/1/0445/3462/8516/files/98534338273.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2913/files/lodiwes.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/govomaluwikaku.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/86480699960.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/fiwomagenebedujojoko.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_off00007ffe.bin
b67074900fa7098b09d598ce4b0da71826ba9e6051241b05fd4f20a3c76c1f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFE 5004 bytes
font_01_sfnt_off000090d9.bin
6941d8404ef771b0a4b70583228dc2e8ea870219e040838afb9044b0c62caec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D9 16512 bytes

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