Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7e6c38e25ab0a2…

MALICIOUS

PDF

46.2 KB Created: 2020-08-25 04:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2f7a715fc4fb176ad6ff031c5404a40 SHA-1: 8fc192b35a9d04e4f282db1415a00dded65716a7 SHA-256: 2d7e6c38e25ab0a21ce7b9627219ec72ff82c33874ca63124943986aacc36621
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=bearpaw+boots+sizing+guide', which is also flagged as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely for further exploitation or credential harvesting.

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.cc/pify?keyword=bearpaw+boots+sizing+guide
    • http://zemepo.kyocreations.com/uploads/1/3/1/8/131856214/zudumazesagib.pdf
    • http://files.westonmusic.co.uk/uploads/1/3/0/7/130776499/xodasiwepape_faposapubikanap_xekudixas.pdf
    • http://files.coalitionforanimals.com/uploads/1/3/1/3/131383602/pasadel_gawojegoxow_duxafe.pdf
    • http://files.columbiacomputers.com/uploads/1/3/1/3/131379042/8886044.pdf
    • http://files.journeylutheranministries.org/uploads/1/3/1/6/131606968/vovemavis-kosumatom-nezegop-sejekageruniw.pdf
    • https://cdn.shopify.com/s/files/1/0432/3390/2760/files/argentometri_fajans.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/bcc_fcc_hcp.pdf
    • https://cdn.shopify.com/s/files/1/0432/6365/6099/files/seinfeld_george_answering_machine_song_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0435/8871/4653/files/tarobafalaweserosu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/56595732551.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2198/files/butodoweguki.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/40506738971.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/77698725330.pdf
    • https://cdn.shopify.com/s/files/1/0440/0214/8510/files/biological_nitrogen_fixation_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/60953705626.pdf
    • https://cdn.shopify.com/s/files/1/0430/4214/4407/files/laboxaro.pdf
    • https://cdn.shopify.com/s/files/1/0437/7745/8334/files/biochemistry_textbook_lehninger.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/pandas_dataframe_join.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_off0000765b.bin
bc18830d9534fd26db9dd03b5acbc36caed4ff058849aaa119ac03ca09601f0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x765B 5424 bytes
font_01_sfnt_off000088ec.bin
731d052baa3a85a12c1cb69aaf528b20811c25debe8b7faf8fc96c1181d5b9d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x88EC 10240 bytes