Malicious PDF — malware analysis report

Static analysis result for SHA-256 a386f6f553ff9d2e…

MALICIOUS

PDF

46.9 KB Created: 2020-09-13 01:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11cc136616ba42b28ce822458f54515c SHA-1: 5eeb59155ea2b33d94a831e94986a805db7e4303 SHA-256: a386f6f553ff9d2e72814fb6182859a8e264a0973963a91425dbae3aa9bd014a
128 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 are hosted on cdn.shopify.com, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'sketchup 2016 manual pdf' and the malicious redirector URL, indicating a lure to download potentially malicious content.

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.link/wix?keyword=sketchup+2016+manual+pdf
    • https://cdn.shopify.com/s/files/1/0432/8574/1726/files/examen_auxilio_judicial_2020_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8366/9412/files/xerorubodowokuxave.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/jodisevapoxufibupabef.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/90009515788.pdf
    • https://cdn.shopify.com/s/files/1/0428/9642/5119/files/bopidejijodu.pdf
    • https://static.usrfiles.com/ugd/a298ce_0352d16acc12464e85c1608b8ea1b612.pdf
    • https://static.usrfiles.com/ugd/0d2908_8f9807b060ea4aafa2eac314c2eb89e4.pdf
    • https://static.usrfiles.com/ugd/83e24f_ea3776b0aff34b0892b80346ff3bfe98.pdf
    • https://static.usrfiles.com/ugd/69695d_e12d2fb482ca40d3a56d63e6faec2a79.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/frankie_and_benny_s_menu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6277/9295/files/65455260357.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/wafegotexonotefamarubud.pdf
    • https://cdn.shopify.com/s/files/1/0438/8893/5067/files/37600799290.pdf
    • https://static.usrfiles.com/ugd/0049ca_5a982a80d3454069b2b759cbc5ecaedf.pdf
    • https://static.usrfiles.com/ugd/9c0842_0af3582bf51f4c49931ed403ec0e359b.pdf
    • https://static.usrfiles.com/ugd/6350c7_4f66059ffec54f968dc804a330209b4b.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_off000075d6.bin
18eed60b1e57aaf2e2f2d698a482ea5f3687f709d6f3b8629904e5de51ef8b7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x75D6 5768 bytes
font_01_sfnt_off0000896a.bin
46ff19b46cb77d2e921d4c5979d8956eaf99ea10ee526392bfe6cc925d9e8c71
pdf-font-stream PDF embedded font (sfnt) at offset 0x896A 11028 bytes