Malicious PDF — malware analysis report

Static analysis result for SHA-256 a602f46a802394cf…

MALICIOUS

PDF

112.5 KB Created: 2020-08-30 06:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f4d6b3c6251e8b280172e6e2bc15172 SHA-1: 5113ccc12605d8e2efdac1db71b2785c5ee137a7 SHA-256: a602f46a802394cfcc710ce50090b077013fe830895ebaae8d0fdfa9892fa786
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=research+in+motion+rimm'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirect URL, reinforcing the malicious intent.

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.cc/wix?keyword=research+in+motion+rimm
    • https://cdn.shopify.com/s/files/1/0429/2342/5955/files/dazirigibuwulono.pdf
    • https://cdn.shopify.com/s/files/1/0431/8055/6452/files/riemann_hypothesis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/39844121093.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/piwuveradowamidofafo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/5775182147.pdf
    • https://static.usrfiles.com/ugd/0047a4_9db62ea5a0fc434c99e263b6bc851528.pdf
    • https://static.usrfiles.com/ugd/7f16bd_e5bc8130500f4fc1b42ace9762080cdf.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a7b5481c35146aba65296ebdd191c79.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/laguwegasubamijofobemi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/7007/files/mathematics_for_economics_and_business_jean_soper.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/pepegurugotewuveravizut.pdf
    • https://static.usrfiles.com/ugd/aef5b7_1e071ea0cb3244f29708990880b05cee.pdf
    • https://static.usrfiles.com/ugd/a58b01_baba6b0b969a4e5c8e73d89fc7648763.pdf
    • https://static.usrfiles.com/ugd/40b9e6_d7e69ef150d040819d6f4433402330ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_15da5ebc1360471ab55a8ca19d7e0308.pdf
    • https://static.usrfiles.com/ugd/d775a9_4b2db65554d5445daceed80b3fc809ae.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_off00017a7b.bin
177a70c4b582b66f3d177b4099d748cab90b71dc9fe4ccaf1f15d86b59014099
pdf-font-stream PDF embedded font (sfnt) at offset 0x17A7B 5016 bytes
font_01_sfnt_off00018b57.bin
8575c7542ce53b712f12ba97ef6867e56bbcfae624e40121d1127a565b479f4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x18B57 12792 bytes