Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd039a27f9c9a93…

MALICIOUS

PDF

48.0 KB Created: 2020-08-07 03:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f3a0ad1473782f2cc23f4e602511f5b SHA-1: 858565e5c8eb9a495926636c2f8af0ee38fe794d SHA-256: edd039a27f9c9a93cb921bc0d66b7aad184768cace98a02ddc8421150b0d46ac
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector at 'ttraff.ru', disguised as a search result for 'architectural plan symbols pdf'. This indicates a social engineering attempt to drive traffic to malicious infrastructure.

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.ru/pify?keyword=architectural+plan+symbols+pdf
    • http://files.megaiken.com/uploads/1/3/0/9/130969343/e54b4056.pdf
    • http://files.imaginationts.com/uploads/1/3/0/9/130969305/xemifig-kewifagorir-tuvirakewe-vexekipipatove.pdf
    • http://files.jubileeandthestinkyfish.net/uploads/1/3/1/3/131379946/bowovamarupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6641/files/nawopanawulozosituguja.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/sipapokaxatilemifoxoxufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2166/2365/files/vomukabowes.pdf
    • https://cdn.shopify.com/s/files/1/0434/2670/9665/files/cv_format_for_salesman.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/34116660172.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/kufomedofaku.pdf
    • https://cdn.shopify.com/s/files/1/0430/4797/7114/files/bossa_nova_rhythm_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/java_pong_game.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/muxumokiligizajapite.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/question_and_source_code_for_core_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/pumapak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.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_off00007aac.bin
845f553f267aa8a93f42ab0b72a575f23cb67bce55945c8fa31c82a0b06876e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAC 5628 bytes
font_01_sfnt_off00008da7.bin
89fc61c9c90427988c4dd607b77043f053aac59372ee0ea43bfc2363a8348b8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA7 11428 bytes