Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6705a17834abcf1…

MALICIOUS

PDF

56.6 KB Created: 2020-08-23 02:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94af01a7e2efe7b4e82299f1fe08f40a SHA-1: ff400cefe68a9cb8c1dc04ca8ed21d7993fac7c5 SHA-256: d6705a17834abcf182675d50e495757a872c893e8da97dc23f9eacd2bbe6deaa
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic firing indicates a direct link to a known malicious redirector at `https://ttraff.com/pify?keyword=bsc+1st+year+chemistry+notes+pdf+2018`. The document body, though heavily obfuscated, contains this same URL and references academic notes, indicating a lure to trick users into clicking the malicious link.

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.com/pify?keyword=bsc+1st+year+chemistry+notes+pdf+2018
    • http://files.ashleymossphoto.com/uploads/1/3/0/7/130739287/1982562.pdf
    • http://midogu.martineaxelrod.com/uploads/1/3/1/0/131070627/bipexasis-gakujebofa-nuxetepa.pdf
    • http://files.twofriendsmetalsculpture.com/uploads/1/3/1/8/131871902/a5f3d3457.pdf
    • http://files.doverchoirs.com/uploads/1/3/1/1/131163712/2728441.pdf
    • http://files.sondikakoaukera.com/uploads/1/3/1/3/131381722/vapevulutawoxurowog.pdf
    • https://cdn.shopify.com/s/files/1/0430/5338/3833/files/algebra_maths_genie_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/2251/4338/files/movies_to_apple_tv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4904/1563/files/21300230342.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/77134535914.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/debezasagokomaresamefa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2464/5272/files/introduction_to_mechanics_of_composite_materials.pdf
    • https://cdn.shopify.com/s/files/1/0431/3055/2474/files/possessivpronomen_bungen_englisch.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/48958757949.pdf
    • https://cdn.shopify.com/s/files/1/0434/7871/2472/files/masitelixewox.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1637/files/tojef.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f21.bin
460bf301ca08f1ec225c05705909532fc84befc45c6e22a30cc4d57ef2dbb24f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F21 6036 bytes
font_01_sfnt_off00008388.bin
a0f5a8dfeaa0bb6dc0effbaf73f2996d6fa971a09dbb121d521afc971fdcd47e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8388 3204 bytes
font_02_sfnt_off0000907b.bin
1a59eb1ea88b22b74202798a49f8212710a90503901ea3bb1d8f3e91139f8075		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907B 2576 bytes
font_03_sfnt_off00009b70.bin
8ae57fb8b5246bee93b23b9fd584784a886b52dbb7b3584717695da98bac7c8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B70 10252 bytes
font_04_sfnt_off0000be82.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE82 16224 bytes

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