Malicious PDF — malware analysis report

Static analysis result for SHA-256 298d2568e701594b…

MALICIOUS

PDF

37.9 KB Created: 2020-08-31 04:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15ded4146be08724fa2ab001870d987f SHA-1: 6c6e3d55919b4aa609d634c31b43be6398731beb SHA-256: 298d2568e701594b09b48098bb4e45fc9258187eb880f1e6656607c6bcadca81
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 redirector URL known to host malicious content. The document body itself is heavily obfuscated but contains the primary redirector URL and several benign-looking Shopify links, likely to blend in. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lure users to malicious sites.

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=lattiahiomakone+ja+kiillotusaine
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/basketball_inbound_plays.pdf
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/jemazowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8170/3319/files/apx_wax_vaporizer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/sitosamiwunulur.pdf
    • https://static.usrfiles.com/ugd/9dda13_04eda1a73eae40bfaeb73122d19a596b.pdf
    • https://static.usrfiles.com/ugd/e2b09b_3ce3b88f56f74b918e1303cf9904318a.pdf
    • https://cdn.shopify.com/s/files/1/0463/1327/5554/files/motorcycle_hire_purchase_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0439/3749/7243/files/lugaxijazowezo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/44474355453.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/63697150369.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/fuxopano.pdf
    • https://static.usrfiles.com/ugd/b0b521_c2d69dd334c24ebdb2db66b2bf0601c0.pdf
    • https://static.usrfiles.com/ugd/15ebe2_1af6bb8fbece43d8bc38d832dd4989ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5800377252648beb30c8bc56b1e50e8.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_off00005651.bin
483030d044bdaf5bd0ba378983d4e5f46d6bc2cb9b06397a12ef3a1c350fb081
pdf-font-stream PDF embedded font (sfnt) at offset 0x5651 4908 bytes
font_01_sfnt_off000066e4.bin
74800e1aa98c208783e18082246c1b140f8229da81d71b77b39de18098648488
pdf-font-stream PDF embedded font (sfnt) at offset 0x66E4 10528 bytes