Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2a24b6cee22b2a…

MALICIOUS

PDF

96.8 KB Created: 2020-08-07 18:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e81304d44d139e0b25898a32513e790 SHA-1: 46de674e74c3f15b955135d671ee2a1aee92fe35 SHA-256: bf2a24b6cee22b2af11e9e71b3f5627332c8ea5700e867d812b5700b590cc235
152 Risk Score

Malware Insights

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

The PDF contains a malicious link that redirects to a known malicious domain, ttraff.com, under the guise of providing a "Primavera p6 instruction manual". The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and references the Primavera P6 manual, reinforcing the lure.

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/wb?keyword=primavera%20p6%20instruction%20manual
    • http://files.musicalastrologer.com/uploads/1/3/2/7/132711954/lefirubedejodawa.pdf
    • http://pevusub.savejonesstateforest.com/uploads/1/3/1/3/131379706/gagoremosutiturogiv.pdf
    • http://files.blissfulbeingsspa.ca/uploads/1/3/0/7/130739288/279754a.pdf
    • http://files.glasgowclydecbt.co.uk/uploads/1/3/1/0/131070894/4683279.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/36965885447.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/wotejajeti.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/tuxolisabipuravofawuwud.pdf
    • https://cdn.shopify.com/s/files/1/0432/4920/5405/files/daxulemojetinowofa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/fexutoxuro.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/lojuwubipukepopomojebubum.pdf
    • https://cdn.shopify.com/s/files/1/0432/1565/0980/files/50328070101.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/3ds_max_2010_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5145/0519/files/cara_membuat_cv_via.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/44282820613.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b27.bin
7597ca05d88191d945b493fa774a2684eede0672f419881f47faee53dfcda606
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B27 1684 bytes
font_01_sfnt_off0001338a.bin
6b391b48b6cc417f2751cea4911cb62ebd3f6da8f66bec50405360b406407190
pdf-font-stream PDF embedded font (sfnt) at offset 0x1338A 5292 bytes
font_02_sfnt_off00014574.bin
f499069a82ba77d0593fad2ca8eace182f8364ede96a3539263aab70c09a70e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x14574 15388 bytes