Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3299d2a12548c5…

MALICIOUS

PDF

117.5 KB Created: 2020-08-01 16:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e544073b2e3e310475b55ddba3c94884 SHA-1: efe9462c312a3545a3e524338bf6ec6db85a26a1 SHA-256: bb3299d2a12548c56df94faf876003db60c1463b4ade58e1e87a31d14eb606f2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is used in conjunction with a large number of embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the target URL and a keyword suggesting a lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=playboy+mag+collection
    • http://files.pathwaysretreat.org/uploads/1/3/0/8/130813645/legufuvav-tufodevewub-degowu-zizaw.pdf
    • http://files.yassvalleycruisers.com/uploads/1/3/2/3/132303230/pipemuw_zoxixuji_nilobujazawegen_gonixekubomibib.pdf
    • http://files.mendingspirits.org/uploads/1/3/1/4/131438682/gujuteri-lakafexituxo-norepo-dinimugirazed.pdf
    • http://files.hopedia-mendministries.com/uploads/1/3/0/7/130738531/1771510.pdf
    • https://cdn.shopify.com/s/files/1/0429/9839/9139/files/85532195127.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/napupuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/1025/1176/files/wefotabubatodotopujerebe.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/61032370579.pdf
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/puxelafewofoka.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/75591698843.pdf
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/sexese.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/64445010308.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/6498147468.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3883/files/nba_2k16_free_download_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9829/files/64450546971.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/tudagamerosuturiwelezes.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015b34.bin
8c3d742bb05fb2f1dcd14e67648bf565fa145e40e17b6ce66c9cc47eaddec778		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B34 12044 bytes
font_01_sfnt_off000182d8.bin
53c1bfdc546a7ba8ae17dc2500981bf7a618ef7973d72482c553cdf324ddf9c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x182D8 4876 bytes
font_02_sfnt_off0001935f.bin
c2ae8d08f48999338d711cdac3666903f226981043939f2873369f20f5ced971		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1935F 11576 bytes
font_03_sfnt_off0001ba11.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA11 4324 bytes

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