Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17317a76259efca…

MALICIOUS

PDF

40.5 KB Created: 2020-08-01 20:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee4b8c33fcd7f58ee0051a176a4e2cc9 SHA-1: eac0692a81b25415a7ab6922155fe0cc29d908d0 SHA-256: b17317a76259efca98f970e349576c2d0739858d088d3f2ee7b97a10e6099a28
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious URL. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=marilyn+manson+sweet+dreams+mp3, suggesting a lure to download potentially malicious content disguised as a music file. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=marilyn+manson+sweet+dreams+mp3
    • http://files.levihanes.com/uploads/1/3/1/8/131871586/dizaruvemagavu_xuxubiperewated.pdf
    • http://files.myviewpointon.org/uploads/1/3/0/7/130739789/wiserasibop.pdf
    • http://files.artifactscollectables.com/uploads/1/3/0/7/130739856/xevifeb_vosidotiwaxu_nosizofese.pdf
    • http://files.allsaintsappleton.org/uploads/1/3/1/3/131398139/didejaj-kuxiwedarevisik-pajulelo.pdf
    • http://files.houstonprimaryschool.com/uploads/1/3/1/3/131398253/067d284f2.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/linonusifogifazuwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8681/5139/files/vaximuvegenesowifegapiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0981/8272/files/xuwudilopinivuwofem.pdf
    • https://cdn.shopify.com/s/files/1/0438/1245/4560/files/nediruji.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/88952540579.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0700/files/ravusoruw.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0205/files/4158664777.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/29659139179.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/82053358459.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/26791089338.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/pezipixakobixola.pdf
    • https://cdn.shopify.com/s/files/1/0435/4428/1247/files/83527001190.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lobusine.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/kezune.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_off00005f98.bin
a7d9707a629c91bae974fcf09728631204522f68a5f660746128ef60ce12ea86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F98 5468 bytes
font_01_sfnt_off0000723d.bin
d765014d777701dfa0a0442b67da481e3bc2dc75d61ea32d57b8c3c6c39b5bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 10444 bytes

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