Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa11e317294bc31…

MALICIOUS

PDF

44.5 KB Created: 2020-09-04 16:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 869c2905a27417da8e8355cc38f2f5f9 SHA-1: d59cd0f9cdf3547ccebd68a2d66da61f45ba8899 SHA-256: 8aa11e317294bc3146c8933309dd80b766e1bf67b0cbfc03c60849424d437568
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector URL, indicating an attempt to lure users to malicious content. The presence of a 'download button' lure further supports this. The document body, though heavily obfuscated, contains the malicious URL and references to download-related keywords, reinforcing the attack pattern. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=english+thesaurus+dictionary+apk
    • https://static.usrfiles.com/ugd/a1fb72_d3d1c31d70674b8190c88d801a15aa52.pdf
    • https://static.usrfiles.com/ugd/b8c837_a55e0519319e4b03ae727583a567c2a0.pdf
    • https://static.usrfiles.com/ugd/63d3ad_ed4eddbf16e54c869ad24da2350a4cfb.pdf
    • https://static.usrfiles.com/ugd/277b62_7f4e3cb36bf04dc9befdfc79c71ad435.pdf
    • https://static.usrfiles.com/ugd/fe83c3_16153ac410b7476ebbb484f63eef7946.pdf
    • https://static.usrfiles.com/ugd/b7082a_cb00aa6ec5d645f885795b32d4c8f248.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2bfe7550c034fc0a0d9026a4d0f3553.pdf
    • https://static.usrfiles.com/ugd/f67134_92f963c4a9184baba014b14a30f63752.pdf
    • https://static.usrfiles.com/ugd/c34eac_4756666d981e40948ef97dcf2c87a3e8.pdf
    • https://static.usrfiles.com/ugd/f64db8_c34b9d9a71fc4990bafe118f26792cec.pdf
    • https://cdn.shopify.com/s/files/1/0446/9178/3836/files/microbial_transformation_of_steroids_and_sterols.pdf
    • https://cdn.shopify.com/s/files/1/0450/5364/0856/files/62434956150.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/bryophytes_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/cancer_gastrico_medigraphic.pdf
    • https://cdn.shopify.com/s/files/1/0444/7030/4935/files/multiple_cursors_sublime.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2682/files/35025326613.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_off00006ef6.bin
70bb79ef4418aaba7816ab60dfd10142226861501c0deca12ad21e7f4d908cf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF6 5456 bytes
font_01_sfnt_off0000818f.bin
33e60904e8dc2330e2f0c6a6db8537a41276c8602375e2617b395bd880186af7
pdf-font-stream PDF embedded font (sfnt) at offset 0x818F 10416 bytes