Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5133e6476a806e…

MALICIOUS

PDF

42.8 KB Created: 2020-09-01 04:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02b53d41816e3cfbab47cb26d01135e7 SHA-1: dd9444399c29c6d8b2880a70731c7d48a865d794 SHA-256: 7d5133e6476a806e86197195161a84cc7338803a50c223ca29f881968b9d7dd6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a specific redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the redirector URL and text suggesting a lure for a movie link. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links points to a link farm attack pattern.

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/pify?keyword=adanga+maru+tamil+movie++link
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/japan_travel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/21228724222.pdf
    • https://cdn.shopify.com/s/files/1/0459/2635/0999/files/meditation_violin_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/55715294435.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/92754155618.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4885/files/37966391641.pdf
    • https://static.usrfiles.com/ugd/fe83c3_fd9992dacb3a4a1ca6b322e2655d3164.pdf
    • https://static.usrfiles.com/ugd/fd3290_b363e3580dfc4b039cb5996e46f1062f.pdf
    • https://static.usrfiles.com/ugd/cd79e3_d02f9462a8f64939b528789b90968527.pdf
    • https://static.usrfiles.com/ugd/19103d_c44212813da84ad5a40f12aa81dcdb15.pdf
    • https://static.usrfiles.com/ugd/fedf23_edc4f437edc64e489a31387600f2fe26.pdf
    • https://static.usrfiles.com/ugd/d5d855_b07a01369f974ae6ab999f5556b2f38c.pdf
    • https://static.usrfiles.com/ugd/9e41f0_806bdda9a6fb404f8ad181b3d5386990.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e02.bin
2314d4236c551fd75ce6fb454252457ded5310dac6eb540e73aaac42690935e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E02 4960 bytes
font_01_sfnt_off00006ec8.bin
159ce32acfa1af2443afbc10e4e8eff95da5091c4d8e13fb2d9fc919e0f34896
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC8 9844 bytes
font_02_sfnt_off00009076.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9076 4324 bytes