Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d4c697ca82eda2…

MALICIOUS

PDF

34.3 KB Created: 2020-08-29 21:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c665158f6fcbb3ae8db1e227f3fc1543 SHA-1: 8c3e126f167c0d8a4ffeeb00e12a56b650394f50 SHA-256: d6d4c697ca82eda2126e4e004a89a7ff15097234ea5e53664484c2e7553b6127
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm for SEO manipulation. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.cc/wix?keyword=cursive+writing+book+pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/dinaturakurumo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/angry_birds_2_2._0_1_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/linking_verbs_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6975/0944/files/19433588098.pdf
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/ie_css_hack.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/66762522335.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.pdf
    • https://cdn.shopify.com/s/files/1/0432/0113/4747/files/zuxosovuturadalurudaferus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/9941968634.pdf
    • https://cdn.shopify.com/s/files/1/0435/4870/4920/files/59288558247.pdf
    • https://cdn.shopify.com/s/files/1/0431/3651/6250/files/44165617003.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/mendelian_genetics_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/california_certification_of_trust_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/64876572207.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b67de8ac186408984b0f9405165d63d.pdf
    • https://static.usrfiles.com/ugd/b8c837_25286c4c53824c33bd323f6e63ff0e53.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5fc2254784b4d0182c473388d4d24ca.pdf
    • https://static.usrfiles.com/ugd/09273f_623b96ab8f474b26a647c1cf76d3701e.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_off00004970.bin
4d1ea9fc63be4c81a1dfb2304e2cf998913200462b56626c38419c236ac014f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4970 5228 bytes
font_01_sfnt_off00005b5b.bin
294835e84295fdd8b267bd955180856c233ce6c49850f6dbc5dfce761765377a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5B 9684 bytes

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