Malicious PDF — malware analysis report

Static analysis result for SHA-256 8564ef1463ce2cf8…

MALICIOUS

PDF

38.2 KB Created: 2020-08-03 06:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8d77b1877eeb60baa7e353a3607694f SHA-1: 9e2e27f0fb753eef6d365715a331d6a591e522c7 SHA-256: 8564ef1463ce2cf8f8b2141999551b95effdf473f4de421a08698f412d97feae
150 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 Shopify domains hosting other PDFs, a technique often used for SEO poisoning or link farming. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.com/pify?keyword=solutions+manual+test+banks`. The document body, though partially corrupted, contains text related to 'Solutions manual test banks', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=solutions+manual+test+banks
    • http://files.talesfromthetravelingtavern.com/uploads/1/3/1/0/131070859/pivipekuzu-jozirafufa-wevunizogipe.pdf
    • http://files.pcaspiritstore.com/uploads/1/3/0/7/130775629/6040088.pdf
    • http://files.lianajoychristensen.com/uploads/1/3/1/4/131454733/ac96a0605f.pdf
    • http://files.mateoblanding.com/uploads/1/3/0/7/130775734/9b7be4c2c3.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/fiwibekamuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/zelodezowuwujug.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/jesafarur.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/53424995817.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/timabagomojiguvo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3988/1373/files/sigojizowujuvamijizut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/4076832136.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/sopifisut.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/xidub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ba2.bin
2cb9419f038b66ab69ce44afbc7eb53651f488cc4b8c92ffcab93069d193d0be
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA2 4924 bytes
font_01_sfnt_off00005c35.bin
1f273c111c1706747a4e1b8a76136817696db1efba31ea24db7b1cfcf25820f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C35 9952 bytes
font_02_sfnt_off00007dfd.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFD 4324 bytes