Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f38ae258e2909f…

MALICIOUS

PDF

43.9 KB Created: 2020-08-19 05:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0b7dbff03ee4dd1932e8adc1445b232 SHA-1: aa3dcdc3c75ca5d24bcdbb269c137a580c21f819 SHA-256: b3f38ae258e2909fac31ecbeab8853d07583a55f3ed15271217fa67d2633a071
150 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm for SEO manipulation or malware distribution. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.cc/pify?keyword=boss+baby+wallpaper+free' is a primary indicator of malicious redirection. While no scripts were extracted, the PDF structure itself is designed to lure users into clicking through a high volume of links.

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=boss+baby+wallpaper+free
    • http://files.thebusinessetiquette.org/uploads/1/3/2/3/132302940/2923086.pdf
    • http://files.schec.net/uploads/1/3/1/8/131871894/6851944.pdf
    • http://vipis.fbc-portland.com/uploads/1/3/2/7/132741029/6720569.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5871/files/56461147543.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/gepib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/dokazenirediduxafadojux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/55492529877.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/21467047179.pdf
    • https://cdn.shopify.com/s/files/1/0433/5363/7018/files/chunkzz_movie_cinemavilla.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0429/2457/2835/files/fimegib.pdf
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/brokeback_mountain_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7248/files/63301044253.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/tejubadexabebogigivosozir.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_off00006209.bin
eb76ed822a26dd8690b6fa8fd0616d0c89a3c12a78b6191dc79dda6f21864257
pdf-font-stream PDF embedded font (sfnt) at offset 0x6209 4832 bytes
font_01_sfnt_off00007297.bin
74a5c314faa2e053e4cdc61a04b386fbac7fb79217ff998ef04af9a118a26ada
pdf-font-stream PDF embedded font (sfnt) at offset 0x7297 9932 bytes
font_02_sfnt_off00009499.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9499 4324 bytes