Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b47b4803361b67…

MALICIOUS

PDF

54.4 KB Created: 2020-08-29 19:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac23d8852ff40226c83b258b8fab206b SHA-1: 4a55a737d6bc38c2a0e455566466e42df3972735 SHA-256: 74b47b4803361b677e38a3825d3c972311cc4bd699a83713042e9fdd054d3621
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the malicious URL. The presence of a large number of external PDF links suggests a link farm, likely intended to lure users to malicious content.

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.cc/wix?keyword=i+fuck+sluts+bo+burnham
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/fowivove.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/neverwinter_nights_2_walktrough.pdf
    • https://cdn.shopify.com/s/files/1/0432/3796/5986/files/vuxumulurafokodoxopuwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/android_tv_box_uk_sky_sports.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/cambridge_primary_mathematics.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d1e35c3c613448882a11ca4a22253f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_3107dfe9b730412ba74a3e62a761ee0c.pdf
    • https://static.usrfiles.com/ugd/ac51ce_37685203a3f14d168112277e5780b7db.pdf
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/year_6_math_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/36404844513.pdf
    • https://cdn.shopify.com/s/files/1/0428/4206/3004/files/behringer_u-_phoria_umc404hd_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/lelatovevutemukajisini.pdf
    • https://cdn.shopify.com/s/files/1/0437/6343/3621/files/68101529870.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5190/files/geometric_optics_physics.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/vinujobolutub.pdf
    • https://cdn.shopify.com/s/files/1/0435/7865/4883/files/a_cabeza_de_medusa_marilar_aleixandre.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/importing_dvd_to_itunes.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/autocomplete__renderitem_custom.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006643.bin
0b4b075dc27cb2e7b36c1d04bd2df5fc12dc6621db28366abf9e6b1497f05c81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6643 15664 bytes
font_01_sfnt_off0000985b.bin
b0219be8d09548eaa134fcf7b036d46017cdf7de0fc1c40d8907758628295f6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x985B 5264 bytes
font_02_sfnt_off0000aa0a.bin
4818d6aced25d5a11bee68a4a6b4b4c6644fcc7ba2f7cab841e141301746adbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA0A 10028 bytes

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