Malicious PDF — malware analysis report

Static analysis result for SHA-256 65aa2c3997ce66d3…

MALICIOUS

PDF

45.8 KB Created: 2020-09-10 13:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03e27e76e07821ef247075b1eac0c244 SHA-1: 0cbd3a00777f8c5b1581fb809251b00178f16746 SHA-256: 65aa2c3997ce66d30274912e8b33e944620a8b229ee03d3e7fd3f2e2491005d1
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector, indicating an attempt to lead users to a harmful website. The embedded URL, 'https://ttraff.com/wix?keyword=curriculum+vitae+template+microsoft+word+2010', is presented as a curriculum vitae template, likely a lure to entice clicks. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=curriculum+vitae+template+microsoft+word+2010
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/136d3d_04eb15e5bfab45868d0f8e9df4c26ea1.pdf
    • https://static.usrfiles.com/ugd/b65acf_26bcbdf4f3164ef89e2b148541a20153.pdf
    • https://static.usrfiles.com/ugd/868401_d41066f2ab764724b3520ca08c7501d4.pdf
    • https://static.usrfiles.com/ugd/2c8d66_20566dd17b8b4fe597fa2e1c6f29184e.pdf
    • https://static.usrfiles.com/ugd/b42fd6_b0c2a8ca00bd404983d2dcdd5925edea.pdf
    • https://static.usrfiles.com/ugd/529dbf_8460420086f147cfa798773bd0d37ef3.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7551/files/bajilisimikorigajolag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56325204281.pdf
    • https://cdn.shopify.com/s/files/1/0440/0503/2086/files/piruxabewagufowemunadeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/2887/1318/files/political_economy_of_the_middle_east_richards_and_waterbury.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/rusogupeneno.pdf
    • https://cdn.shopify.com/s/files/1/0428/2033/7831/files/kalnirnay_calendar_november_2020_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/setixituruba.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000737c.bin
f517f5df571886b0e7addb5d997d6c773ace27989456d58a53be549c32e3b38b
pdf-font-stream PDF embedded font (sfnt) at offset 0x737C 5684 bytes
font_01_sfnt_off000086d4.bin
205831cd5f02b3d3e7841ca371aae95551d0643e1580b4f4673a931e01ef5527
pdf-font-stream PDF embedded font (sfnt) at offset 0x86D4 10308 bytes