Malicious PDF — malware analysis report

Static analysis result for SHA-256 e110bf9422d7ccd0…

MALICIOUS

PDF

40.7 KB Created: 2020-08-22 20:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0bb91e321a9c02a946a0c4ccff8de5c SHA-1: a39c87939ad47e7cee2923f3d815a911c457d924 SHA-256: e110bf9422d7ccd043c492b70239c72d376086a95d7ebc8f86815e09a39be521
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body text, though partially corrupted, suggests a lure related to 'army mission games for android', which is likely a pretext to encourage clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=top+army+mission+games+for+android
    • http://sevuwesog.whitefishcreations.com/uploads/1/3/1/4/131437462/gizibogan-xawuje-buxuroregel-bikid.pdf
    • http://files.aspectcareers.com/uploads/1/3/1/3/131382841/bafakon-fekabaduf-dugagufeli.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/dolorazizunogekaw.pdf
    • https://cdn.shopify.com/s/files/1/0461/3390/3513/files/whatsapp_pc_software_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0460/0935/2359/files/tekidumitopowifonigaruko.pdf
    • https://cdn.shopify.com/s/files/1/0447/4788/2650/files/general_ecology_laboratory_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/gas_chromatography_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/0061/9423/files/77464309583.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5782/3396/files/sad_gif_image.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_off000061db.bin
e1c5daf3fb23b0edebcfcc0f7452c6274ed116bed010960630e6b9f95fc331ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DB 5380 bytes
font_01_sfnt_off00007416.bin
b292e6c7c7f23fa893d388c56055bfde6368beb75273ebaf4966643c699fdd26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7416 10020 bytes

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