Malicious PDF — malware analysis report

Static analysis result for SHA-256 d795e2d6e82eaf6c…

MALICIOUS

PDF

50.4 KB Created: 2020-08-12 08:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48b4de9e78697ca4a1d09532ec95551e SHA-1: e20d5f531404ac159dbeb258867316271ed7a23f SHA-256: d795e2d6e82eaf6ce9d2d63064bfca05d8274e58eef72291ce89daffa37ef023
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for "wrist pain exercises pdf". The PDF also contains a large number of external links, many hosted on shopify.com, which is flagged by the PDF_SEO_LINK_FARM heuristic. The primary malicious IOC is the redirector URL.

Heuristics 3

  • 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.
  • 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=wrist+pain+exercises+pdf
    • http://files.writeonpoint.net/uploads/1/3/0/7/130740510/6b331e4faf252.pdf
    • http://files.hisheartcalls.com/uploads/1/3/1/8/131858044/a870507b.pdf
    • http://files.voiceofgodrevivalsministrie.org/uploads/1/3/1/0/131069887/jimetugejenodo.pdf
    • http://koral.teachingconnections.net/uploads/1/3/0/7/130776485/balisevom.pdf
    • http://jozabuzux.dentistsanjose.com/uploads/1/3/1/4/131438888/9658217.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/93083870846.pdf
    • https://cdn.shopify.com/s/files/1/0428/5025/5014/files/convert_m4b_to_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/bahtsul_masail_sidogiri.pdf
    • https://cdn.shopify.com/s/files/1/0429/5150/8131/files/19665976081.pdf
    • https://cdn.shopify.com/s/files/1/0430/5305/6149/files/53934097591.pdf
    • https://cdn.shopify.com/s/files/1/0434/7314/1912/files/33323256109.pdf
    • https://cdn.shopify.com/s/files/1/0437/1900/0229/files/although_and_despite.pdf
    • https://cdn.shopify.com/s/files/1/0431/6469/6732/files/skyrim_flora_overhaul_se.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0447/7698/0629/files/27197624584.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/73210417255.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/52975649310.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/
    • https://cdn.shopify.com/s/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079d3.bin
4ab4442d2f6a895ffbdee5b3233046b05e6eade27785c117041bc1fed988ea99
pdf-font-stream PDF embedded font (sfnt) at offset 0x79D3 4876 bytes
font_01_sfnt_off00008a7a.bin
6df604e23fb07001d94023e5211069b91261c31ce2427ccab8f5e3719d85c466
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7A 10496 bytes
font_02_sfnt_off0000ae5c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5C 4324 bytes