Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72fdd60aced14bb…

MALICIOUS

PDF

43.6 KB Created: 2020-08-12 07:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 027850e6dfdff2c74510d919ed885cdc SHA-1: b1a881d2ccf822f5034e84f815c85d334dcc6e5d SHA-256: e72fdd60aced14bbcb133991cb014ab4114782e8955c03dbf77797a1977003f6
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, including a primary redirector at https://ttraff.ru/pify?keyword=adaptive+learning+technology+pdf. This suggests the document's purpose is to lure users to malicious sites.

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.ru/pify?keyword=adaptive+learning+technology+pdf
    • http://files.impulsestudioboutique.com/uploads/1/3/1/3/131380687/palalasakoji.pdf
    • http://files.uniboarddemo.com/uploads/1/3/2/7/132711947/5864a182f8f8.pdf
    • http://files.howlinwolfhounds.com/uploads/1/3/1/4/131437210/8891353.pdf
    • http://files.eurekaloggerfootball.com/uploads/1/3/0/7/130775848/fosar-josoz.pdf
    • http://files.dipintothereef.com/uploads/1/3/0/8/130874109/fivabolapibazi_bififolafez.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/sipozuxaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3323/files/92741883309.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2238/files/pokabigemari.pdf
    • https://cdn.shopify.com/s/files/1/0443/1269/0844/files/advanced_excel_topics_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/53177252957.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/vileravugesovagewap.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/61405537503.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/babape.pdf
    • https://cdn.shopify.com/s/files/1/0433/5013/0846/files/kezifax.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/cancer_de_mama_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/jatotutozowupotodoluji.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/79258505278.pdf
    • https://cdn.shopify.com/s/files/1/0438/8320/0680/files/stochastic_oscillator.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_off00006ca2.bin
0468f889ef0012f922f9880e30b7429d89ea7287f779201a288392acce21284d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA2 5388 bytes
font_01_sfnt_off00007efc.bin
63afcd365a81d4d14c98db0db8f4398eac59cdc1bdf773b0226250da97902d7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFC 10072 bytes