Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a34f55cec6f50b6…

MALICIOUS

PDF

35.5 KB Created: 2020-09-13 00:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 233c61695d4a851323524388fb2cc10c SHA-1: e950ce7e1eb23a7f7e4e10d31359d0b024f973fd SHA-256: 2a34f55cec6f50b62e5ee3bf29444a1ca8138f05da80f5f640c8a889367b06fd
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.club' which is flagged as a malicious redirector, likely serving as a lure for users searching for software downloads. The document body and embedded URLs suggest a phishing attempt to trick users into downloading files. The ML classifier strongly supports the malicious nature of this PDF.

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=3dse+apk+bios+download
    • http://fojape.flauntit.ca/uploads/1/3/1/6/131606000/4a5e5cddf91ab4.pdf
    • http://files.axiotac.net/uploads/1/3/0/7/130775400/dosimatogotufurizi.pdf
    • http://buwozef.southernarizonabds.org/uploads/1/3/1/4/131454683/7bf58008331.pdf
    • http://bezufav.wallheathtennisclub.co.uk/uploads/1/3/1/0/131071157/puxijoke.pdf
    • http://files.fiftythreestarsandasun.com/uploads/1/3/2/6/132681596/8a84d.pdf
    • https://cdn.shopify.com/s/files/1/0436/5733/0853/files/12801427867.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/gogovorude.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0651/files/destiny_child_global_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/daberafixunavak.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4130/files/35049178074.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/lotewaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4102/1349/files/mojomirisojipud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0463/2933/1869/files/debt_budget_planner_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/anlage_v_steuererklrung_2018.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_off00004c64.bin
aca588d3328e3fbc8c826b3dff079efe2443058df57f120b98cecec5496cb9b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C64 5224 bytes
font_01_sfnt_off00005e49.bin
def6fbc506c7527c7fd7f2234e0b3c9a6acb1766fb221d99c8928084568cae65
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E49 10272 bytes