Malicious PDF — malware analysis report

Static analysis result for SHA-256 355a8978818f7f9f…

MALICIOUS

PDF

47.5 KB Created: 2020-09-18 18:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3094bcad136c1b8bb6c7681991d3433f SHA-1: f4ad63c8bb46c2de021e59dfc146813a1269c65b SHA-256: 355a8978818f7f9f7f43765f8e885e942b341a0696b6ff977e38a67ee4dc3146
152 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 a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.me. The document body, though heavily obfuscated, contains the target URL. This indicates a phishing or scam attempt designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=riverside+high+school+greer+sc
    • http://tizonofix.noellampinga.com/uploads/1/3/0/9/130968911/3024866.pdf
    • http://files.friendsofappalachia.org/uploads/1/3/1/4/131483254/tuvures.pdf
    • http://files.grimoirtua.com/uploads/1/3/0/7/130775134/wujutasasizezo.pdf
    • http://nulomaduw.raffaelecassina.com/uploads/1/3/0/8/130813965/sufozuzofo-tilepasokivej-vijunogawisosa-ginesoxujavuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5534/files/14932560149.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1298/files/el_imperialismo_siglo_xix.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/lemon_bundt_cake_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0438/8408/5416/files/4359969601.pdf
    • https://7710e08f-2764-4907-a189-21b1b58c402c.filesusr.com/ugd/51c472_592abb77fda2427e93fde6008f561f7b.pdf?index=true
    • https://58d27200-66ae-4b39-8b77-ad38b914a000.filesusr.com/ugd/bd1c09_8dd20e9070854d6c83523f43a88276f3.pdf?index=true
    • https://0ffdc1ab-6891-42fb-b79a-0032234ee48e.filesusr.com/ugd/b7ab08_987ba1e2aa764e3fbf346c2901021c1d.pdf?index=true
    • https://033cadbc-1aa3-4a8e-b28c-f0bffc5fdb38.filesusr.com/ugd/03f576_5e564630ed5f4e6e94c434e8d8ee22d3.pdf?index=true
    • https://cd2e98d8-fd34-4bef-9794-26fce161b7da.filesusr.com/ugd/1decf9_c7e618bdfcda48f5aad80a6ebb8d7a1b.pdf?index=true
    • https://06628229-3a58-4a7c-8406-5a0f36c903e7.filesusr.com/ugd/fe83c3_5d4338e7d7054eebaad58ba7f58291d2.pdf?index=true
    • https://8caa329a-3812-4254-a437-b3ce55c9935d.filesusr.com/ugd/ce4b7c_862619fda33f4dc0a2c7ac3c30e84548.pdf?index=true
    • 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_off00006fc6.bin
3a4366b4c32cdf09f79ddb2033ef7413bb242318f253d47b77a6b3143c035d05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC6 4660 bytes
font_01_sfnt_off00007fa8.bin
81fb2cd26663ae71c6a230a123420e11576861594ed9218a149d59b726747719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA8 10324 bytes
font_02_sfnt_off0000a309.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA309 4324 bytes

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